楼主: jixuanzhong
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40吨的压力怎么承受,400的缸径最多承受9吨啊---[请教] |
发表于 2006-10-25 22:57:57
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Re: 40吨的压力怎么承受,400的缸径最多承受9吨啊---[请教]
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