The fence panel can be further equipped with a lower cover plate, and the steel plate is fixedly connected with the lower cover plate.

本实用新型还可设置下盖板，钢板与下盖板固定连接。

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Behind a high fence a robot glides on a monorail around 20 solar panel arrays attached to steel poles, like WALL-E on a Disneyland ride. (See video below.) The robot, made by Menlo Park, Calif.

FORBES: Can Solar Robots Cut The Cost of Renewable Energy?

Behind a high fence in Menlo Park, Calif. a gray, tuna-shaped robot glides on a monorail around 20 solar panel arrays attached to steel poles, like WALL-E on a Disneyland ride.

FORBES: How Robots Are Making Solar Power Cheaper