1. Particularly understand contract, include installation place, installation equipment type, amount, special request or not. 详细了解合同情况，包括安装地点、安装设备型号、数量等，有无特殊安装要求。
2. If the power supply wire comes from ceiling, the power supply wire and receptacle should be installed outside 2 meters of supposed installation equipment. 若供电线路从天花板引下，则供电线路及插座应在拟安装设备处2米范围外。
3. Must be able carry installation equipment, tools and on some occasions spare parts, work outdoors, use tools for general installation work &climb a ladder. 工作时需携带设备、工具 （或在某些情况下兼携船用备件）、进行户外工作、使用操作工具或需爬梯登船等。
