另外也有黑色的阀门盖 also black valve caps
至少一个料仓通过带有阀门的管道与压力气源相通。
At least one bin is communicated with a pressure air supply via a pipeline with a valve.
循环泵通过各设有阀门的两管道与电解槽的 两个阳极室连接。
The circulating pump is communicated with the two anode chambers respectively through two pipelines each of which is provided with a valve.
所有阀门的内部轴承均采用自润滑式滑动轴承，材质采用碳钢全衬聚四氟乙烯。
All the valve's internal self-lubricating bearings are sliding bearings, the whole material the use of carbon steel PTFE liner.
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