电能量计量计费
power telemeter and settlement system
电能量计量计费系统
the System of Measuring and Billing of Power Energy
power energy billing system
tele meter reading system
telemeter reading system
光学频率计量
optical frequency metrology
时间频率计量
time and frequency metrology
声频频率计
sonic frequency cymometer
乘积频率转换
product frequency converter
乘积频率转换电路
product frequency change-over circuit
对数正态累积频率图
lognormal cumulative frequency
积分频率计
integrating frequency meter
积算剂量率计
integrating dose rate-meter
累积剂量率计
integrating dose ratemeter
累积频率
cumulative frequency
cumulative relative frequency
accumulative frequency