标 准 编 号:BS EN ISO 5167-3-2003 简体中文标题:用插入圆截面管道中的压差装置测量流体流量.喷嘴和文杜利喷嘴 繁体中文标题:用插入圆截面管道中的压差装置测量流体流量.喷嘴和文杜利喷嘴 English Name:Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Nozzles and Venturi nozzles