你知道還問,搗亂。
哎。螺紋外緣直徑。當年的製圖課還沒忘光啊。
所有跟帖:
• 你是學工科的,嘻嘻~ -仨飽一倒- ♂ (0 bytes) () 03/24/2011 postreply 21:10:03
• 你是學工科的,嘻嘻~ -仨飽一倒- ♂ (0 bytes) () 03/24/2011 postreply 21:10:03
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