Use , detected valves pressure reduction and read out the degrees , can be considered by the flow valves 使用时,测得阀门压降和读出开度,即可算得通过阀门的流量。
Valves leakage result in economy and society loss surprising . the method for detecting valves inner leakage is less and un - effectively 由于阀门泄漏造成的经济和社会损失是十分惊人,而针对阀门内漏的检测手段较少且效果较差。