“水阀”的英语

疏水阀的流向要与管路流向一致.Steam trap flow direction in accordance with that of the pipe line.疏水阀是如何知道何时开启何时关闭?How does the steam trap know when to open and close?圆盘式疏水阀适用于高压差的蒸汽主管线,蒸汽管网的阻汽疏水.Disk type steam traps are for high press...