他们受雇于制冷与空调安装工承包商，各种工业环境，食品批发商，工程公司和零售及服务机构。
They are employed by refrigeration and air conditioning installation contractors, various industrial Settings, food wholesalers, engineering firms and retail and servicing establishments.
承包商必要时应配备设备用房的临时空调以满足安装和设备本身的要求。
The contract shall equip temporary conditioning for equipment room if necessary to meet the requirements of installation and the equipment.
承包商必要时应配备设备用房的临时空调以满足安装和设备本身的要求。
The contract shall equip temporary conditioning for equipment room if necessary to meet the requirements of installation and the equipment.
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