The babbitt adjustable Hammer-Blow Sprocket Rim is for use with hard to operate gate, globe and Angle valves in overhead locations.
对于高度超过头部，操作困难的闸阀、截止阀和角阀，可以采用巴氏可调节锤击链轮。
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Except for such features as wrong operation prevention, stem blow-out proof, mounting, pad provided, the metal to metal sealed ball valves made by WILLIAMSON possess the following unique features.