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国际标准化组织 (ISO)于 1998年颁发国际标准ISO116 31《流体流动测量———规定流量仪表性能的方法 (Measurementoffluidflow———Methodsofspecify ingflowmeterperformance)》重新定义了rangea?
International Organization for Standardization (ISO) issued in 1998 the international standard ISO116 31 “Fluid Flow Measurement - Method of measuring flowmeter performance (Measurementoffflowid --- Methodsofspecifyflowflowmeterperformance”) redefined the rangea?