A pressuremeasuringinstrument ng 50 with switch contact replaces pressure switch and pressure gauge.
有开关接点的压力测量仪表径50，替代了压力开关和压力表。
2
Thee barometer is a good instrument for measuring air pressure.
气压计是测量气压的好仪器。
3
An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.