| 摘要 |
A coupling device has a shackle, a hook connected to the shackle, and a safety clamp device surrounding the shackle. The safety clamp device has a central reinforced rib, a flap bar, a slot, a plurality of clamp teeth, and a flexible plate. The flexible plate has a curved portion and a guide recess. The flap bar is inserted in the slot of the safety clamp device.
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