The______is used to measure the volume of a liquid or gas through a pipeline within any given period of time
A.flow-meter
B.viscometer
C.micrometer
D.feeler
正确答案:A
The______is used to measure the volume of a liquid or gas through a pipeline within any given period of time
A.flow-meter
B.viscometer
C.micrometer
D.feeler
正确答案:A