压紧装置自动前行到位及复位，操作简便。
Clamping device can realize feeding and resetting automatic, which makes operation easily.
手动操作可通过扳动离合器手柄实现。通电后离合器可自动复位。
Pull clutch can reach manual operation and it can return automatically by the clutch.
释放拉力后，扳手将自动地复位，为下一次操作做准备。
Release pull and wrench automatically resets for next operation.
释放拉力后，扳手将自动地复位，为下一次操作做准备。
Release pull and wrench automatically resets for next operation.
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