从操作手臂部机构为平面转动关节构型，由丝传动机构驱动；

In detail, the arm adopts the planar rotating joint structure driven by a cable.

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所以在开始拉动后，关注左手指关节转动向下。

So after the initial pull, focus on turning the knuckles of your left hand down.

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所以在开始拉动后，关注左手指关节转动向下。

So after the initial pull, focus on turning the knuckles of your left hand down.

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