環面蝸桿傳動設計和修形
董學朱
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擺線齒錐輪及準雙曲面齒輪設計和製造
董學朱
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董學朱

Overview
Works: 2 works in 2 publications in 1 languages
Titles
環面蝸桿傳動設計和修形 by: 董學朱 (Language materials, printed)
擺線齒錐輪及準雙曲面齒輪設計和製造 by: 董學朱 (Language materials, printed)
 
 
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