Open the back cover and push down the release pin on the back cover to remove.

打开后盖，按下后盖上释放针，以便卸下后盖。

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To release the traction force, simply push the release button.

要释放的牵引力，只需按下释放按钮。

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To release the traction force, simply push the release button.

要释放的牵引力，只需按下释放按钮。

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