M 门禁后备电源
型号：:
m access reserve power
适用范围：:
the power supply for building intercom, a variety of entrances and exits access controller, a normal dc12v current charged, power failure through the battery to continue to provide dc current.
型号：:
m access reserve power
适用范围：:
the power supply for building intercom, a variety of entrances and exits access controller, a normal dc12v current charged, power failure through the battery to continue to provide dc current.
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