A cordless phone also has no wires. It can be useful in the office or the factory. Imagine that you are working in an office and a customer calls you asking for some information.

 
  • 无绳电话也没有导线。它在办公室或工厂里很有用。设想一下,你正在办公室里工作,这时一个客户打电话向你索取资料。
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