AGA XQ9902本工程技术说明提供了使用高于100英寸水柱（w.c.）的压差的指南，用于与AGA第3号报告《天然气和其他相关碳氢化合物流体的孔板计量》一起使用的孔板流量测量。

AGA XQ9902This Engineering Technical Note provides guidelines for the use of differential pressures higher than 100 inches water column (w.c.), for orifice flow measurement to be used in conjunction with the AGA Report No. 3, Orifice Metering of Natrual Gas and Other Related Hydrocarbon Fluids.