参比条件 meaning in English

reference condition

Natural gas - standard reference conditions
天然气标准参比条件
Petroleum liquid and gas measurement - standard reference conditions
石油液体和气体计量的标准参比条件
Process measurement and control devices - general methods and procedures for evaluating performance - part 2 : tests under reference conditions
过程测量和控制装置通用性能评定方法和程序第2部分:参比条件下的试验