DIN EN ISO 5167-4-2004
用插入圆截面管道中的压差装置测量流体流量.第4部分:文丘里管(ISO 5167-4-2003).德文版本EN ISO 5167-4-2003
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 4: Venturi tubes (ISO 5167-4:2003); German version EN ISO 5167-4:2003