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Who should be in charge of the air conditioning rack outside the high-rise building?

The manufacturer is responsible for installing the air-conditioning plug-in machine on the air-conditioning board, taking over, and insulating the condenser pipe. According to your description, the shutter should be the location where the air conditioner plug-in machine is installed, because the shutter can not be removed due to deformation, which leads to the installation of the plug-in machine. This problem has to be solved by contacting the construction unit.