638.ZP·W1-18型无绝缘移频自动闭塞,区间发送盒移频功出电压()。[321040101]
A.(A)DC3.0V±0.5V
B.(B)AC3.4V±0.4V
C.(C)DC3.4V±0.4V
D.(D)AC4.0V±0.4V
正确答案是B
638.ZP·W1-18型无绝缘移频自动闭塞,区间发送盒移频功出电压()。[321040101]
A.(A)DC3.0V±0.5V
B.(B)AC3.4V±0.4V
C.(C)DC3.4V±0.4V
D.(D)AC4.0V±0.4V
正确答案是B