Internet Technology Co., Ltd. Shanxi Chi Mei told intercom history: In 1970 Iterface Mechanisms has developed a "two-dimensional code", digital radio models, only the price of a two-dimensional matrix intercom salable printing and reading equipment. At that time two-dimensional matrix intercom for automated newspaper publishing process. Two-dimensional matrix intercom printed on the tape, Xinzhou walkie-talkie type by today's one-dimensional CCD scanner reading. Internet Technology Co., Ltd. Shanxi Chi Mei told intercom history: Kermode photocell new invention was to collect the reflected light. "Empty" is a strong signal reflected back, "bar" reflected back is a weak signal. And electronic components in today's high-speed applications are different, Kermode measured using a magnetic coil "article" and "empty." Like a child the wires connected to the battery and then wound up in a nail jam. Xinzhou walkie-talkie type, Shanxi CMO Internet technology, digital radio models provided by the Internet Technology Co., Ltd. Shanxi CMO. Xinzhou walkie-talkie type, Shanxi CMO Internet technology, digital radio models are Shanxi Chimera Internet Technology Co. (www.sxqmhl.com) (www.sxqmhl.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: Li Chi-ming.