求翻译：中央空调、机房专用空调、净化工程设备的销售及工程设计、咨询、安装；中央空调配件、中央空调系统的维护、清洗；电器控制设备、机械设备、高低压开关柜、电缆桥架、保温材料、机电设备、五金交电、通讯设备、建筑材料、塑钢门窗销售；楼宇自控网络工程。地热采暖工程设计及设备安装、销售；电梯设备销售。是什么意思？

Central air conditioning, room air-conditioning, purification engineering equipment sales and engineering design, consulting, installation; central air conditioning parts, central air conditioning systems maintenance, cleaning; electrical control equipment, machinery and equipment, low voltage switc

Central air-conditioning, room dedicated air-conditioning, purification of engineering equipment sales and engineering, consulting, installation accessories; central air-conditioning, central air conditioning system maintenance, cleaning of electrical control equipment, and machinery and equipment,

Central air conditioning, engine room special-purpose air conditioning, purification engineering facilities sale and engineering design, consultation, installment; Central air conditioning fitting, central air-conditioning system maintenance, clean; The electrical control equipment, the mechanical d

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