method critical difference
color-minus-difference voltage
colour-minus-difference voltage
Economic Voltage Difference
line voltage difference
protection of voltage difference
voltage difference on zero line
Voltage-difference-method
critical and non-critical human error
critical velocity [= critical speed]
super-critical and ultra super-critical power unit
the k-out-of-N:G redundant system with repair and multiple critical and non-critical errors
具有带临界和非临界故障的可修k/N:G冗余表决系统
the super-critical and ultra super-critical valve