输出电压的负极与电子天平壳体连接。在进行操作时，电子天平壳体允许接地。
The pole of the output voltage is connected to the balance housing, which can be grounded for operation.
照明配电箱用薄钢板做成无骨架形体，主要部件有壳体、零线排、保护接地排、面板等。
The sheet steel for lighting distribution box is made into frameless shape, the main parts of which are shell, zero line bar, protective earth bar and panel etc.
一种轨道型接地端子改良结构，为一金属接地组件与绝缘壳体的组合；
The utility model discloses an improved structure for a rail grounding terminal, particularly relating to the combination of grounding components and an insulating shell;
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