3ISO 17089,封闭管道内的流体流量测量一气体超声流量计一第1部分:用于贸易计量和分配计量的流量计(Measurement of fluid flow in closed conduits 一 Ultrasonic me-ters for gas - Part 1 : Meters for custody transfer and allocationmeasurement) [ S].
4AGA Report No. 9: 2007,用多声道超声流量计测量天然气流量(Measurement of gas by multipath Ultrasonic Mme-ters) [ R].