639.ZP·W1-18型无绝缘移频自动闭塞,区间功放盒功出电压()。[321040101]
A.(A)AC150V～210V
B.(B)DC150V～210V
C.(C)AC100V～200V
D.(D)DC100V～250V
正确答案是A
639.ZP·W1-18型无绝缘移频自动闭塞,区间功放盒功出电压()。[321040101]
A.(A)AC150V～210V
B.(B)DC150V～210V
C.(C)AC100V～200V
D.(D)DC100V～250V
正确答案是A