Ball valve fully open, the flow resistance is very small, almost zero, so the ball valve diameter is widely used in petroleum and natural gas pipelines because the pipeline cleaning easy.
球阀在完全开启时,流阻很小,几乎等于零,因此等径球阀广泛应用于石油天然气管线中,因为容易清扫管线。
Laundry-room storage organizes not only cleaning essentials but also easy-to-misplace items like a fly swatter.
洗衣间储藏室不仅要整理好必要的清洁物件,也要放好易随处乱放的东西,比如苍蝇拍。
Instead, make housework simple. Simplify your housework with two easy cleaning systems.
现在,让我们使整理房间变得更加简单吧。我们的简化家务劳动的大工程可以概括为以下简单的两点。
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