定向功率计 directional power meter

传导率测定计 conductivity tester

固定频率听力计 fixed-frequency audiometer

额定功率的计算 Calculation of power ratings

小时固定工资率计划 hourly-rate wage plan

电容式含水率测定计 capacitance moisture meter

角膜曲率计检定规程 Verification Regulation of Ophthalmometers

倍率计检定规程 Verification regulation for dynameter

流量计率定 calibration of flowmeter