4736| 6
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球閥的區別,ball valve 和globe valve ---請教 |
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為什么硬密封的球閥這么難壓
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回復 3# 的帖子
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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