我们来到故宫的第一个门——端门。

We first came to the palace gate - end door.

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介绍了电动内端门的构成、控制系统及工作流程。

Described are the composition, control system and working process of the electrical inner end door.

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介绍了电动内端门的构成、控制系统及工作流程。

Described are the composition, control system and working process of the electrical inner end door.

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