column shut-off valve
... conical valve 锥形阀 column shut-off valve 柱关闭阀 compensating air valve 补充空气阀, 补偿气阀, 平衡气阀 ...
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... cold water stop valve 凉水止阀 column shut-off valve 柱关闭阀 column switching valve 柱转换阀 ...
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