[Science stickers] The meaning and difference of pipe diameter DN, De, D, d, Φ
In pipeline engineering, do the symbols of pipeline diameter DN, De, D, d, and Φ make it clear to ev...
Read MoreIn pipeline engineering, do the symbols of pipeline diameter DN, De, D, d, and Φ make it clear to ev...
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Read MoreAccording to the requirements of use, the type of pressure reducing valve and the accuracy of pressu...
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