- 29-7-0 繪圖步驟
- 29-7-1 主體
- 29-7-2 下圓柱與鑽孔
- 29-7-3 上圓柱與鑽孔
- 29-7-4 圓柱肋材
- 29-7-5 上、下鑽孔柱
- 29-7-6 導角
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