有效护理工时
efficient nursing man-hour
板的有效工作宽度
effective distribution width
半数有效效应室浓度
half effective target effect-site concentration
含时有效解
transient efficient solution
机组有效效率
unit effective efficiency
实时有效负载装载状态
real time payload weight status
信号有效时滞
effective delay of signal
有效工具
effective instructional tool