EN ISO 5167-2:2003
圆截面管道中用压差装置测量流体流量.第2部分:节流孔板 ISO 5167-2-2003;代替EN ISO 5167-1-1995
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 2: Orifice plates ISO 5167-2:2003; Supersedes EN ISO 5167-1:1995