The sonic nozzle is used to calibrate turbine flowmeters, Roots flowmeters, and density compensated orificegas mass flowmeters.
并应用音速喷咀对涡轮流量计、腰轮流量计和密度补偿式孔板气体质量流量计进行标定。
2
Full set of pipe orifice, valves, flanges and counter flanges, fasteners and all other attachments, all water release valves, gas release valves and safety valves.
全套管道孔板、阀门、法兰及反法兰、紧固件及其它所有附件，所有放水、放气阀门及安全阀。
3
An orifice plate is often used to restrict and measure gas flow.