operator on duty
... operator notation 算子表示法,算符表示法... operator on duty 值班人员;值班操作人员... operator part 操作码部分...
watchkeeper
... watchingdevice监视装置 watchkeeper值班人员 watchmancharge看守费 ...
person on watch
... person on shore 岸上人员 person on watch 值班人员 person 人 ...
watchstander
... watchroom值班室 watchstander值班人员 waterabandon-shipwater弃船应急备用水 ...