At present, the names of the door machines vary. But according to the use of the door machine classification, can be divided into: Iron door open machine, courtyard door open machine, retractable door opener, garage door open machine, revolving door open machine, hanging type door opener, Courtyard door opener, shutter door opener, industrial door opener, open window machine and so on. According to the opening machine from the current can be divided into AC and DC door opening machine.
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