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。
The sonic nozzle is used to calibrate turbine flowmeters, Roots flowmeters, and density compensated orifice gas mass flowmeters.
中国石油浙江销售分公司采用LL型腰轮流量计对成品油计量以来效果明显，已在成品油的动态计量中推广应用。
PetroChina Zejiang Sale Branch applied LL type waist wheel flow meter for measuring product oil for a month and good effects are obtained. The flow meter has been used for dynamic measurement widely.
中国石油浙江销售分公司采用LL型腰轮流量计对成品油计量以来效果明显，已在成品油的动态计量中推广应用。
PetroChina Zejiang Sale Branch applied LL type waist wheel flow meter for measuring product oil for a month and good effects are obtained. The flow meter has been used for dynamic measurement widely.
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