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缓动继电器
gen. non-quick relay
el. time-delay relay
el.mach. slow acting relay; slow operate relay
hydroel.st. delay-action relay
met. slow-operating relay
tech. delayed relay; hesitating relay; slugged relay; time delay relay
telecom. delay action relay; slow-acting relay; slow operating relay
缓动继 电 器: 4 phrases in 3 subjects
Hydroelectric power stations2
Metallurgy1
Technology1