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便携式ＤＴＭＦ电子拨号器邢观锋随着通信事业的不断发展，人们使用电话进行互相联系已越来越普遍。随身携带一本记满电话号码的袖珍记录本已成为习惯。当需要拨电话联系时先要在记录本上查找一番，然后再在电话键盘上一位一位地拨号。而本文介绍的便携式ＤＴＭＦ电子拨号...
Portable DTMF Electronic Dialer Xing Guanfeng With the continuous development of communications, people use the phone to connect with each other has become increasingly common. It is customary to carry a pocket-sized notebook with a phone number on hand. When you need to make a phone call first look in the notebook to find something, and then dial one by one on the phone keypad. This article describes the portable DTMF electronic dial ...