... 砂轮截断机 cut-off grinder 截断-泄放阀 block and bleed valve 截断线 transversal ...
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... 截断阀起动调汽阀 intercepting valve 双截断排空阀 doubleblock-and-bleedvalve 截断泄放阀 block and bleed valve ...
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double block-and-bleed valve 双截断与排放阀门
double-block-and-bleed valve 双关双泄放阀
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