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09:28, 30 April 2008 (diff | hist) . . (+2,971)‎ . . User talk:Shgc ‎ (current)
09:24, 30 April 2008 (diff | hist) . . (+4,261)‎ . . N User talk:Shgc ‎ (New page: 球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。球阀在管路中主...)

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