您祘回了,但您不對,是加號.
所有跟帖:
• 明確條件:在凸麵是 重力-離心力;在凹麵是 重力+離心力。 -皆兄弟也- ♂ (0 bytes) () 01/18/2011 postreply 20:15:12
• 明確條件:在凸麵是 重力-離心力;在凹麵是 重力+離心力。 -皆兄弟也- ♂ (0 bytes) () 01/18/2011 postreply 20:15:12
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