... line-to-line valve 零叠量阀; 零遮盖阀 one-way valve spring 单向阀弹簧 one valve 单级阀 ...
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one-way y valve spring 单向阀弹簧
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The one-way air outlet valve (6) adopts a spring type one-way air outlet valve.
所说的单向放气阀（6）采用弹簧式单向放气阀。
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On account of demand, inside pipe of hot spring preparation sets with one-way valve and solution feed pump.
还可根据需要在温泉制剂 管内设置单向阀及供液泵。
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