The question is whether the arch needs support.
I thought "support" under an arch structure such as a bridge weakens it.
所有跟帖:
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你的議論是值得考慮。如果足弓已經塌陷,不能讓它總是塌著的,是否應該人為地支撐出一個弓來呢。。。
-禦用文人-
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11/08/2014 postreply
13:23:34