初次开机要求先用螺丝刀拨动电动机风扇，确保泵内叶轮无卡滞，然后启动电动机；
The primary starting request uses the screwdriver to move the electric motor ventilator first, guaranteed that in the pump the impeller does not have the freezing, then starting motor;
系统具有镜片少，结构简单，变焦轨迹平滑无卡滞等优点，可用于模拟不同尺寸的闪电单元。
The beam expanding system has some advantages of fewer lenses, simple structures and smoothly zoom trajectory, and it is suitable for simulating lighting elements with different sizes.
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