半数有效效应室浓度
half effective target effect-site concentration
单级过程有效系数
effective simple process factor
反应有效系数
valid reaction coefficient
混凝土强度有效系数
effective factor of concrete strength
基坑有效系数
effective coefficient of excavation pit
能量系数－有效独立法
energy coefficient-effective independence method
爬电比距有效系数
creeping distance ratio effective factor
爬电距离有效系数
effectiveness of creepage distance
热有效系数
heat effective coefficient
heat efficiency coefficient
散热量有效系数
coefficient of effective heat emission
有效系数
coefficient of efficiency
effective coefficient
照明有效系数
lighting effectiveness factor
热传递总系数
coefficient of overall heat transmission