GB/T 2624.1-2006
用安装在圆形截面管道中的压差装置测量满管流体流量 第1部分:一般原理和要求
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
GBT2624.1-2006, GB2624.1-2006