1. First, lift the spreader to a position close to the container and put the spreader on the container to be lifted.
2. Secondly, confirm that the spreader is consistent with the center line of the container, start lowering the spreader, and check whether the rotary lock correctly enters the four corners of the container.
3. After the twist lock is completely put away, the twist lock is locked, so that the container can be unhooked. It is strictly forbidden to lift and hang directly and quickly.