by 原来是热胀冷缩, Tuesday, September 17, 2013, 08:55
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by 3D, Tuesday, September 17, 2013, 09:18 @ 原来是热胀冷缩
by 蒸馒头的原理, Tuesday, September 17, 2013, 09:19 @ 原来是热胀冷缩