simplex dialing造句

例句与造句

1. Strowger system introduced in australia and new zealand . development of key - type impulse sender , and simplex dialing on toll lines
   澳大利亚和新西兰引进史端乔系统。开发键式脉冲发送器和长途电话线单工拨号。
2. It's difficult to find simplex dialing in a sentence. 用simplex dialing造句挺难的