637.ZP·W1-18型无绝缘移频自动闭塞,区间发送盒报警电压()。[322040101]
A.(A)DC20.0V～27.0V
B.(B)DC30.0V～35.2V
C.(C)AC30.0V～35.2V
D.(D)DC35.2V～40.1V
正确答案是A
637.ZP·W1-18型无绝缘移频自动闭塞,区间发送盒报警电压()。[322040101]
A.(A)DC20.0V～27.0V
B.(B)DC30.0V～35.2V
C.(C)AC30.0V～35.2V
D.(D)DC35.2V～40.1V
正确答案是A