GB/Z 35140-2017用差压装置测量流体流量GB/T2624范围之外的孔板、喷嘴和文丘里管的使用指南国家标准
英文:Measurement of fluid flow by means of pressure-differential devices—Guidelines for the specification of orifice plate...
英文:Measurement of fluid flow by means of pressure-differential devices—Guidelines for the specification of orifice plate...