educational toy for the composition of drawings, charts and the like based on a drawing so-called mute.

• 1. 基于图纸POI的施工图纸数据化方法、装置和电子设备 [P] . 中国专利： CN113094787A . 2021-07-09
• 2. 一种基于PDF格式图纸文档的客户工程图纸智能识别系统 [P] . 中国专利： CN110378302A . 2019-10-25
• 3. Creation system applicable to the design drawings by puzzle, puzzles, books, toys printing plates, board games, educational toys, stickers, cards, bases of models models, etc. [P] . ES1026505Y . 1994-11-16

  机译： 适用于拼图，拼图，书籍，玩具印版，桌游，益智玩具，贴纸，卡片，模型底座等设计图纸的创建系统。

• 4. METHOD OF DRAWING UP BASE CHART FOR ROAD ADMINISTRATION, PROGRAM THEREOF, DATABASE FOR ROAD BASE CHART, AND ROAD ADMINISTRATION SUPPORT SYSTEM [P] . 日本专利： JP2004013660A . 2004-01-15

  机译： 提取用于道路管理的基础图表​​的方法，其程序，用于基础道路的数据库和道路管理支持系统

• 5. EDUCATIONAL-CHART DRAWING-BOARD AND WRITING-DESK. [P] . 美国专利： US1158212A . 1915-10-26

  机译： 教育图绘图板和写字台。

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• 8. The Influence of Steel Composition and Drawing Conditions on the Residual Stress Pattern Developed in Cold Drawing Steel Bars [R] . Hall, R. C., Hehemann, R. F. 1952

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