2523| 6
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哪個管的流量大或一樣大? |
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點評
錯 50-80-50的大 阻力不一樣
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點評
手動截止閥或電磁球閥閉鎖
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點評
什么軟件
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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