640.ZP·W1-18型无绝缘移频自动闭塞,接收盒绿灯继电器电压()。[321040101]
A.(A)AC18.0V±1.0V
B.(B)DC18.0V±1.0V
C.(C)AC23.0V±3.0V
D.(D)DC23.0V±3.0V
正确答案是D
640.ZP·W1-18型无绝缘移频自动闭塞,接收盒绿灯继电器电压()。[321040101]
A.(A)AC18.0V±1.0V
B.(B)DC18.0V±1.0V
C.(C)AC23.0V±3.0V
D.(D)DC23.0V±3.0V
正确答案是D