可能是認為塑料件足夠頂用。機床上也有不少用塑料齒輪的。
所有跟帖:
• 二位說的都對。廠家一定要做時效和破壞實驗的,大概能知道平均壽命的長短。 -史迷- ♂ (6 bytes) () 08/05/2013 postreply 23:32:15
• 二位說的都對。廠家一定要做時效和破壞實驗的,大概能知道平均壽命的長短。 -史迷- ♂ (6 bytes) () 08/05/2013 postreply 23:32:15
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