42" is too low. at least 48". The center of weight of a 6' man i

来源: borisg 2014-12-10 09:47:53 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 0 次 (35 bytes)
回答: 出租房的 code 的问题.xinfu992014-12-10 09:41:57
You want to add a margin of safety.
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