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Traditional resilient seated butterfly valves are made primarily for fluid isolation as they have got weak control features. The seat is really an elastic solitary piece that holds in position the valve system. This design and style can have its integrity compromised if the valve is kept partly open. บทความเครื่องจักรกลการเกษตรและอะไหล่ https://milohewmd.blogginaway.com/18888945/how-เพรสเชอร-เกจ-ค-อ-can-save-you-time-stress-and-money


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