都已回答過了。不值得重複。
所有跟帖:
• 剛體, 即研究時不計任何變形效應的物體。 -stvw- ♂ (0 bytes) () 03/06/2012 postreply 20:00:06
• 剛體, 即研究時不計任何變形效應的物體。 -stvw- ♂ (0 bytes) () 03/06/2012 postreply 20:00:06
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