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引用第3楼cwb06093088于2013-07-13 20:29发表的 :曾经用氧气瓶给胎冲过,表示没啥感觉
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引用第12楼firebll于2013-07-13 22:04发表的 :空气密度为1.293g/L,即使轮胎真空,也轻不了几克。。。
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