Mechanism Design Data, 11-19 PT Thread
Mechanism Design Data, 11-19 PT Thread, 
機械設計基本資料, 管用螺紋
標籤： 管用螺紋, 機械設計基本資料, Mechanism Design Data, PT, Thread
張貼者：Albert Ong 於
上午11:38
2009/04/24
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