一个或多个单位可以远程开启，同时或顺序，用一个简单的低电压开关关闭。
One or more units may be turned on remotely, either simultaneously or in sequence, with a simple low voltage switch closure.
一个或多个单位可以远程开启，同时或顺序，用一个简单的低电压开关关闭。
One or more units may be turned on remotely, either simultaneously or in sequence, with a simple low voltage switch closure.
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