使用前要测试绝缘电阻，阻值应大于2兆欧；热态或温度较大时，绝缘电阻应不低于0.5兆欧。
Please test the insulation resistance before application; the value should be over 2M,and it cannot be less than 0.5 Mwhen thermal stateortemperature is higher.
风机启动前请检查外观是否完好，连接是否可靠，风轮转动应灵活无阻滞，如发现异常请立即停车检查。
Before operating the blower, please check the blowerwhether the outlook is fine and the connection is reliableornot; wind wheel spinning well without reta