When installed, the high-pole lamp is automatically hung in a hook-shaped trough of the hanging hook after raising to the position of the automatic hanging and unloading gear; 安装灯具时,灯具上升到自动挂钩卸荷装置的位置后自动挂到吊钩的钩形槽里;
Calculation of theoretical flow and unloading groove of helical gear pump 斜齿齿轮泵理论排量与卸荷槽的计算