Working Condition：
● Ambient temperature: -25 ℃ ~ + 50 ℃ (see the pusher operating instructions when below-25 ℃);
● No flammable, explosive and corrosive gases in the surrounding working environment, and the air relative humidity is not more than 90%;
● Elevation of the use site in accordance with GB755-2000.
● See the pusher nameplate for the power supply voltage.
