ZP·W1-18型无绝缘移频自动闭塞,站内发送盒报警电压( )。[321030201]
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B
ZP·W1-18型无绝缘移频自动闭塞,站内发送盒报警电压( )。[321030201]
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B