个人非商业用途免费；商业及机构用途须事先取得相应书面授权。下载或勾选同意不授予商业许可。
文件与自动摆放仅供模型设计和制作辅助，不构成强度、制造质量或使用安全保证。打印、装配和实际使用前，请核验尺寸、材料、设备与工艺；操作失误或未经验证使用可能造成经济损失及人身伤害。
责任依法律、实际过错及因果关系确定；本条款不排除依法不得免除的人身损害责任，以及故意或重大过失造成财产损失的责任。
本条款适用于火箭积木拼装系统（本网站）的参数化模型设计、预览、几何计算、自动摆放、分板、STL/ZIP及设计任务文件生成与下载。“开发者”指依法对本网站开发或运营承担相应责任的主体；本称谓不代表任何未公开的公司、认证或执业资质。
用户在有机会阅读重点提示和完整条款后，主动勾选确认并点击“同意条款并下载”，表示愿意按本条款使用有关服务与文件。也可先在“阅读与确认”中确认，再点击下载。本标签页内当前版本的后续下载沿用该确认，重要条款变更后须重新确认。取消、关闭、仅浏览、打开全文或保持沉默均不视为接受，也不视为放弃任何法定权利。
本网站在第9条所述个人非商业许可范围内免费提供公开功能及下载，不收取个人非商业使用费用。商业及机构使用须先取得相应书面授权，是否收费及具体范围依另行有效约定；界面可以访问或文件可以下载不扩大许可范围。免费不等于对安全、质量或法定义务的豁免。服务范围不包含个别工程设计委托、生产监理、产品认证、打印代工、设备维护、现场指导、持续可用性或即时人工客服承诺。网站已经明确作出的有效承诺及另行达成的有效约定，仍应依法履行。
网站可能因修复、安全、兼容性、维护或第三方托管故障调整、暂停部分功能。开发者应依法处理已知缺陷和风险，作出必要提示并采取合理措施；本条不允许隐瞒已知重大风险，也不排除违法中断等行为应负的责任。
输入、单位、算法、离散网格、浮点精度、软件版本及运行环境可能影响几何、壁厚、螺纹、公差、配合、重量及打印结果。预览可见、检查通过、网格闭合或下载成功，只说明相应数字处理环节完成，不证明实物已经通过强度、耐热、耐久、飞行稳定、装配、安全或量产验证。
“自动优化”“推荐姿态”等仅是在特定候选方向、参考设备、材料和工艺假设下作出的辅助选择，不保证对所有零件、打印机及切片配置都最快、最省料或全局最优。时间、用料和支撑数字可能是估算或特定样件的切片结果，并非实际制造结果承诺。STL本身不保存完整耗材、支撑和打印工艺；导入后自动朝向、缩放、修复或切片会改变结果。
用户应确保输入、导入内容及所选用途准确合法，核对尺寸单位、外径/内径、配合间隙、连接、壁厚及文件版本；打印前在适配切片软件检查模型完整性、支撑、落板、占地、层间结构和工艺参数。采用新尺寸、材料或工艺时，先做小样、测量、试配及与用途相称的验证，再决定是否扩大制作。
制造前备份重要参数和文件，合理控制首批规模。发现破损、层间分离、过薄、干涉、松脱、异常变形或疑似危险，应停止相关使用并检查。用户在制造、销售、转交文件或实物时，应依法履行自身承担的审查、说明及安全义务，向接收者传递适用版本及风险信息。上述义务不替代开发者依法应当履行的义务，双方均应合理避免已知损失扩大。
本网站用于模型外观和构件设计辅助，不提供真实航空航天工程设计、安全认证或现场操作许可。未经相应专业验证的输出不得用于载人设备、生命维持、医疗、关键承重、压力容器或其他一旦失效可能严重危及人身安全的用途，不得用于违法活动或伤害他人。
“发动机安装座”等名称、尺寸可输入或几何可生成，不说明动力装置、点火、燃烧、增压、飞行或发射活动已经安全或合法。相关活动须独立满足适用规则和许可条件，由具有相应能力的人员依据设备要求评估、测试及管理，不能仅凭本网页输出实施。
打印和实物操作涉及高温、运动部件、烟尘或挥发物、尖锐边缘、脆断及小零件误吞等风险；须按设备、耗材和场所要求进行通风、防护、现场看护及儿童隔离。教学、展示或免费分享不消除这些风险。
未成年人应在监护人知情及适当指导下使用。超出其民事行为能力范围的条款接受、购买、制造和相关活动，应依法由监护人代理或同意；不能仅凭未成年人点击推定监护人同意。未成年人不得独立进行高温、机械、动力、增压或发射等危险操作。监护安排不免除开发者依法应负的责任。
代表学校、企业或其他组织使用时，须具有组织内部的代表权限，并按第9条事先取得开发者的相应用途授权；两者不能相互替代。组织、教师、加工方和销售方应独立履行其依法承担的管理、产品及安全义务，不能以使用本免费工具替代自身审查。
打印机、切片软件、插件、耗材、加工服务、托管网络及外部资源可能由第三方提供。开发者并不因引用名称或提供链接就成为其生产者、销售者、代理人或保证人，也不控制其质量和履约。第三方原因造成的问题依法按实际原因和责任处理；如开发者自身存在依法应负责的过错，不因第三方参与而免责。
请从可信渠道获取软件和文件，检查版本、完整性及设备设置，防范文件被替换、错误修复、单位误读或恶意软件。浏览器缓存、扩展、设备资源及网络中断可能影响运行；请保留重要数据和原始文件。
在法律允许范围内，开发者按免费辅助工具的实际服务范围承担相应责任，不承担未作出的个别性能、收益或制造成功保证。对于仅由错误输入、未经核验的自行修改、不当加工或使用、违反明确操作要求，或其他与开发者依法应承担的行为无因果关系的原因造成的耗材报废、返工、设备损坏、停工、交易或其他损失，开发者不承担相应赔偿责任。
是否存在过错、因果关系及损失范围须结合证据和适用法律认定，不因本条款预先推定所有损失归用户承担；双方或多方均有过错时依法分担。经济损失不因名称为“间接”“经营”或“预期收益”就一概排除，也不以免费或已付费用为零设置零赔偿上限。
本条款不免除或限制开发者依法应当承担的人身损害责任，不免除因故意或重大过失造成财产损失的责任；不排除消费者、个人信息主体及其他权利人依法不可被排除的权利或其他强制性责任。免费、风险告知、点击确认及用户自行操作均不能改变这些法律边界。
个人用户为非商业学习、兴趣创作、个人自用制作及非营利展示，可免费使用本网站公开功能，并生成、下载、修改和使用输出。是否属于商业用途，应按实际目的及用途判断，不仅依据个人、个体经营者或组织的身份；个人接单不因使用个人名义而免费，企业员工纯粹的个人爱好也不因其职业身份自动成为商业用途。
任何用户将本系统或在接受本版条款基础上新生成或首次下载取得的输出用于经营、获利或为商业项目提供服务，应事先取得开发者明确的书面商业授权。除本条下述个人订单有限代打印例外外，商业用途包括但不限于：收费设计、打印或加工；出售、出租或付费提供数字模型、设计文件或据此制作的实物；客户委托项目；作为收费培训或课程的内容；企业或产品的设计研发、打样、测试及生产；与商品或服务推广、引流、获客相关的使用。未直接收费、尚未盈利或免费赠送，不当然使经营用途成为非商业用途。
学校、培训机构、实验室、社会组织及其他单位开展教学、科研、公益或内部项目，不自动适用个人免费许可，应事先取得覆盖相应用途的书面授权；此类活动不因属于机构活动就一概被认定为商业。属于前款经营用途的，须取得商业授权。代表组织接受条款须具有该组织的相应权限，组织内部批准不替代开发者授权。
个人仅为自己已获允许的非商业用途，委托第三方按指定文件打印并支付合理加工费，不因此使该个人用途成为商业用途。在本有限许可内，加工方可仅为完成该个人订单处理文件、交付实物，无须为该订单单独取得商业授权；不得据此自行销售文件或模型、建立商品目录、用于其他订单、再传播文件或开展其他经营用途。个人之间非商业分享输出时，应附本条款版本、全文链接及风险提示；分享不转让本软件许可或向接收者授予商业授权，接收者的使用仍须具有相应合法依据。
书面授权可以采用经开发者明确确认、可保存查验的合同或电子书面形式，具体许可主体、用途、期限、数量、转授权权限及费用等以有效约定为准；不得推定未授予的范围，超出范围或改变为商业用途前应取得补充授权。未经明确允许，不得转让、共享或转授权商业许可，也不得以他人的许可覆盖自身业务。免费获取、下载成功、勾选声明、提出申请或开发者未回复，均不构成商业授权。当前网站未提供公开的授权申请通道；未实际取得相应授权前，请勿开展需授权的用途。本页不设定未经另行约定的收费。
网站程序、原创界面、标识、文档及受保护内容的权利属于相应权利人。免费使用不等于权利转让，也不当然授权复制部署整套网站、嵌入其他商业服务、冒用标识或虚称合作认证；相关使用须有独立合法依据或相应授权。用户输入和导入内容应具备合法权利，使用输出仍须核查著作权、商标、外观及专利等权利。本条属于使用许可约定，不宣称全部参数化几何或输出当然归开发者所有，也不作无侵权保证。
本条向后适用于用户接受本版条款后使用的相关服务，以及在该接受基础上新生成或首次下载取得的输出；不追溯收回此前已经合法取得的文件使用权及授权，也不将此前仅浏览或设计行为当然视为接受。不限制用户对自有输入独立享有的权利、法律规定的合理使用及其他法定权利；第三方组件、开源代码及资源的独立许可证在其适用范围内优先执行，不因本条被撤回或追加限制。未经授权或超范围使用时，应停止相关未获许可的用途；责任及救济依法和有效约定确定，不预设无限赔偿或排除法定抗辩。
生成文件和设计参数的处理及网站统计以《访问统计与隐私说明》所述实际方式为准。接受本条款不等于授权收集与服务无关的个人信息。请勿在导入内容或公开分享中包含密码、私人地址等敏感信息。
为避免重复提示，网站仅在当前标签页会话的sessionStorage及必要的页面内存中记住已确认的条款版本和时间，不将同意记录、身份证明或签名上传服务器。浏览器可恢复会话；可用页面“撤回本标签页确认”清除。记录是本机交互状态，可能被修改或清除，不是身份认证、电子签名、实际阅读证明或不可抵赖的证据。撤回阻止后续沿用确认，不追溯消灭既有合法权利义务。
“免费”说明没有下载价款，不意味着法律责任归零；“需核验”说明数字结果不能代替实物检测，不把开发者自身违法或过错转嫁给用户；“无因果关系不赔偿”须据事实及法律判断，不能只因点击下载就认定开发者无过错；“同意下载”不表示永久放弃投诉、诉讼、索赔或其他救济。
全文可在确认前后独立阅读和通过浏览器保存、打印。目前网站没有在线人工客服或对外公布的专用条款咨询通道，本页不虚设邮箱、不承诺即时个别答复。若对重要条款仍不理解或不能接受，请先取消下载，不应勉强确认。用户依法请求说明及寻求救济的权利保留；页面提示、勾选和确认本身不被声明为已经当然完成所有法定提示说明义务。
条款按标示版本和日期向后适用；重要修改应明确提示，并要求后续下载重新确认，不当然追溯适用于先前完成的下载或剥夺既有合法权利。某一条被依法认定无效或不可执行，不影响其他依法有效内容；缺失或无效部分依适用法律处理。开发者不保留排除用户权利的单方“最终解释权”。
本条款依中华人民共和国大陆地区法律理解和适用；依法应适用的其他强制性保护规则不因本条款而被排除。发生争议可以协商，但协商不是投诉或起诉的强制前置程序。任何一方均可依法向有管辖权的人民法院寻求救济；不指定不存在的主体地址或任意法院，也不限制法定管辖和救济途径。中英文用于便利阅读，差异依法解释，不以语言版本排除强制性保护。
Personal non-commercial use is free. Commercial and organizational use require prior written authorization for that use. Downloading or confirming does not grant a commercial license.
Files and orientation suggestions assist model design and fabrication. They do not certify strength, manufacturing quality or safety. Check dimensions, materials, equipment and settings before printing, assembly or use. Incorrect operation or unverified use can cause financial loss and personal injury.
Liability depends on applicable law, fault and causation. These terms do not exclude or limit personal-injury liability that cannot lawfully be excluded or limited. They also do not exclude liability for property loss caused by intentional misconduct or gross negligence, or any other liability that applicable law makes non-excludable.
These terms cover the Rocket Block Assembly System’s parameter-based model design, previews, geometry calculations, orientation and plate suggestions, and generation and download of STL, ZIP and design-task files. “Developer” means the party legally responsible for development or operation as applicable; it does not imply an undisclosed company, certification or professional qualification.
After a reasonable opportunity to read the highlights and full terms, actively checking the confirmation and selecting “Agree to terms and download” expresses acceptance for the relevant service and files. You may also confirm through “Review and confirm” before downloading. Subsequent downloads in this tab use the same accepted version; material changes require new confirmation. Cancellation, closing, browsing, opening the terms or silence alone do not constitute acceptance or waive statutory rights.
Public functions and downloads are free within the personal non-commercial license in section 9. Commercial and organizational use require prior written authorization; any fees and scope follow a separate valid agreement. Technical access or a successful download does not expand the license. Free access is not an exemption from legal safety or other obligations. The service does not include an individual engineering commission, production supervision, certification, printing service, equipment maintenance, on-site guidance, guaranteed continuous availability or immediate human support. Valid express commitments and separate valid agreements remain applicable.
Features may change or pause for fixes, safety, compatibility, maintenance or third-party hosting failures. The developer must address known defects and risks as legally required, give necessary warnings and take reasonable measures. This does not permit concealment of known serious risks or exclude liability for unlawful interruption.
Inputs, units, algorithms, discrete meshes, numerical precision, versions and operating environments can affect geometry, walls, threads, tolerances, fit, weight and printing results. A visible preview, a passed check, a closed mesh or a successful download means only that a digital step completed. It is not proof of tested physical strength, heat resistance, durability, flight stability, fit, safety or production suitability.
“Optimization” and “recommended orientation” are assistance under specific candidate directions and reference machine, material and process assumptions. They are not guarantees of the fastest, lowest-waste or globally optimal result for every model and configuration. Time, material and support figures can be estimates or slicer results for specific samples, not promises of physical results. STL does not contain a complete material, support or printing profile. Auto-orientation, scaling, repair or slicing after import can change the outcome.
Ensure inputs, imported content and intended use are accurate and lawful. Verify units, inside/outside diameters, clearances, connections, wall thickness and file versions. Use a suitable slicer to examine mesh integrity, supports, bed contact, footprint, layers and process settings. New dimensions, materials or settings require a sample, measurement, fitting and verification proportionate to the intended use before scaling fabrication.
Back up essential parameters and files and limit initial production appropriately. Stop relevant use and investigate cracks, delamination, thin sections, interference, loose connections, deformation or suspected hazards. When manufacturing, selling or transferring files or parts, fulfill your own legal duties of review, disclosure and safety and pass on applicable versions and risks. These duties do not replace the developer’s own obligations. All parties should reasonably prevent known losses from increasing.
This is assistance for model appearance and components, not real aerospace engineering, safety certification or operational permission. Outputs without appropriate professional validation must not be used for occupied equipment, life support, medical applications, critical load-bearing parts, pressure vessels or other uses where failure can seriously endanger people. Unlawful or harmful uses are prohibited.
Names such as “motor mount”, accepted input values or generated geometry do not establish the safety or legality of propulsion, ignition, combustion, pressurization, flight or launch. Such activities require independent compliance with applicable rules and permissions and evaluation, testing and supervision by appropriately capable people according to equipment requirements. Web geometry alone is insufficient.
Printing and handling may involve heat, moving parts, fumes, sharp edges, brittle failure and small-part choking hazards. Follow equipment, material and site requirements for ventilation, protection, supervision and separation from children. Teaching, display or free sharing does not remove these risks.
Minors should use the system with a guardian’s knowledge and appropriate guidance. Acceptance, purchases, fabrication or activities beyond their legal capacity require guardian representation or consent as legally required. A minor’s click does not by itself establish guardian consent. Minors must not independently perform hazardous thermal, mechanical, powered, pressurized or launch operations. Guardianship does not remove the developer’s statutory liability.
Use on behalf of a school, business or other organization requires authority to represent that organization and the developer’s prior use authorization under section 9; neither substitutes for the other. Organizations, teachers, fabricators and sellers must independently fulfill their own management, product and safety duties; use of a free tool does not substitute for their review.
Printers, slicers, plugins, materials, fabrication, hosting, networks and external resources may be supplied by third parties. A name or link does not make the developer their manufacturer, seller, agent or guarantor. Responsibility for third-party issues follows actual causes and applicable law; third-party involvement does not excuse the developer’s own legally actionable fault.
Obtain software and files from trustworthy sources and check versions, integrity and equipment settings. Guard against replacement, incorrect repair, misread units and malware. Browser caches, extensions, device resources and network failure can affect operation. Preserve essential data and original files.
To the extent permitted by law, the developer is responsible for the actual scope of the free assistance and does not assume individual performance, profit or manufacturing-success guarantees that were not made. The developer is not responsible for waste, rework, equipment damage, downtime, transaction losses or other losses caused solely by incorrect inputs, unverified user changes, improper fabrication or use, violation of clear operating requirements, or causes lacking a causal link to conduct for which the developer is legally responsible.
Fault, causation and the extent of loss must be determined from evidence and applicable law, not presumed to fall entirely on the user. Shared fault is allocated under law. Economic loss is not categorically excluded merely by being called indirect, commercial or anticipated profit. A zero liability cap is not imposed by reference to the free price.
These terms do not exclude or restrict personal-injury liability that law does not permit to be excluded, liability for property loss caused by intentional misconduct or gross negligence, non-waivable rights of consumers or personal-information subjects, or other mandatory liability. Free access, warnings, confirmation and user operation do not change these limits.
Individuals may use public functions and generate, download, modify and use outputs free of charge for non-commercial learning, hobbies, fabrication for personal use and non-profit display. Commercial status follows the actual purpose and use, not just whether the user is an individual, sole trader or organization. Personal commissions are not free merely because an individual performs them, and an employee’s purely personal hobby is not automatically commercial because of their occupation.
Any use of the system or outputs newly generated or first obtained by download on the basis of acceptance of this version for business, profit or services to a commercial project requires the developer’s prior express written commercial authorization. Except for the limited personal-order fabrication permission below, examples include paid design, printing or fabrication; selling, renting or providing paid access to digital models, design files or resulting physical products; client commissions; use as part of paid courses or training; business or product development, prototyping, testing and production; and use connected to product or service promotion, traffic generation or customer acquisition. No direct charge, no profit yet, or free giveaways do not automatically make a business purpose non-commercial.
Schools, training providers, laboratories, community bodies and other organizations do not automatically receive the personal free license for teaching, research, public-interest or internal projects. They require prior written authorization covering that use. Organizational status alone does not classify all such activities as commercial; business purposes described above require commercial authorization. A representative needs authority from the organization, which does not replace the developer’s authorization.
An individual may commission a third party to print specified files solely for that individual’s permitted non-commercial use and pay a reasonable fabrication charge without making the individual’s use commercial. Under this limited permission, the fabricator may process files and deliver parts only for that personal order without separate commercial authorization for that order. This does not allow independent sales of files or models, product listings, other orders, redistribution of files or other business uses. Non-commercial sharing of outputs between individuals must include the terms version, full-terms link and risk notices; sharing neither transfers the software license nor grants commercial authorization. Recipients still need an appropriate lawful basis for their use.
Written authorization may be a contract or a retainable and verifiable electronic writing expressly confirmed by the developer. Its parties, purposes, term, quantities, sublicensing powers and fees follow the valid agreement. Unspecified scope must not be presumed; obtain additional authorization before exceeding the agreed scope or changing to commercial use. Commercial permission may not be transferred, shared or sublicensed without express permission, nor may another party’s permission be used to cover your own business. Free access, successful downloads, declarations, applications or silence do not grant commercial authorization. No public authorization-application channel is currently provided; do not undertake a use requiring authorization before actually obtaining it. This page imposes no fee that has not been separately agreed.
Rights in software, original interfaces, marks, documentation and protected content remain with their respective owners. Free use neither transfers those rights nor automatically authorizes cloning the site, embedding it in other commercial services, impersonation or false partnership or certification claims. Such uses need an independent lawful basis or applicable authorization. You need lawful rights in your inputs and must assess copyright, marks, designs, patents and other rights in using outputs. This is a use-license provision; it does not claim that all parametric geometry or outputs automatically belong to the developer or guarantee non-infringement.
This provision applies prospectively to relevant services used after acceptance of this version, and outputs newly generated or first obtained by download on the basis of that acceptance. It does not revoke previously lawfully acquired rights to use files or authorizations, or treat earlier browsing or design activity alone as acceptance. It preserves independent rights in your own inputs, statutory permitted uses and other legal rights. Separate third-party and open-source licenses govern their own scope without revocation or additional restrictions from these terms. Unauthorized or out-of-scope uses must stop; liability and remedies follow law and valid agreements, without predetermined unlimited damages or exclusion of statutory defenses.
Handling of files, design inputs and site analytics follows the actual practices described in the Analytics and Privacy Notice. Accepting these terms is not authorization to collect unrelated personal information. Do not place passwords, private addresses or other sensitive information in imported content or public sharing.
To reduce repeated prompts, only the accepted terms version and time are kept in this tab’s sessionStorage and, if necessary, page memory. No consent record, identity proof or signature is uploaded. Browsers may restore sessions. Use “Withdraw this tab’s confirmation” to clear it. This editable local state is not authentication, an electronic signature, proof of reading or irrefutable evidence. Withdrawal applies to future use of the remembered confirmation, not retroactive cancellation of existing lawful rights and duties.
“Free” means no download price, not zero legal responsibility. “Verify” means digital results cannot replace physical checks, not that the developer’s own fault transfers to you. “No causation” must be established from facts and law, not merely your click. Acceptance does not permanently waive complaints, claims, litigation or other remedies.
You can read the full terms independently before and after confirmation and save or print them with your browser. There is currently no online human support or published dedicated terms-enquiry channel. No fictitious mailbox or immediate individual response is promised. If important provisions remain unclear or unacceptable, cancel rather than confirm. Statutory rights to request explanation and seek remedies remain. Highlights, a checkbox and confirmation are not claimed to automatically fulfill every legal duty of notice and explanation.
The displayed version and date apply prospectively. Material changes must be highlighted and confirmed for subsequent downloads, without automatically altering prior downloads or removing acquired lawful rights. Invalid or unenforceable provisions do not invalidate other lawful provisions; applicable law supplies the relevant rules. The developer does not reserve a unilateral “final interpretation” power excluding user rights.
These terms are interpreted under mainland Chinese law, without displacing other mandatory protections that legally apply. Parties may negotiate, but negotiation is not a compulsory prerequisite to complaints or proceedings. Either party may seek relief in a court with jurisdiction under law. No fictitious address or arbitrary exclusive court is designated. Chinese and English aid understanding; discrepancies are resolved under applicable law without excluding mandatory protection by choice of language.