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；

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Fuel pump (unloading pump, high viscosity pump, asphalt pump) gear wear and tear parts mainly is the tooth meshing, involute face and gear ends plane.

燃油泵(卸油泵，高粘度泵，沥青泵)齿轮的磨损部位主要是齿的啮合、渐开线工作面和齿轮两端平面。

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