Use , detected valves pressure reduction and read out the degrees , can be considered by the flow valves 使用時,測得閥門壓降和讀出開度,即可算得通過閥門的流量。
Valves leakage result in economy and society loss surprising . the method for detecting valves inner leakage is less and un - effectively 由于閥門泄漏造成的經濟和社會損失是十分驚人,而針對閥門內漏的檢測手段較少且效果較差。