1. Tighten the bolts and nuts along the thread, and don't damage the thread with excessive force.

2. Before the disc steel bar is used as a suspender, it must be qualified new steel bar, and it can only be used after cold drawing or straightening.

3. When hanging the auxiliary keel, make sure that the main keel and the auxiliary keel are close together. When the pendant is connected with the main keel, clamp it with wire cutters so that there is no moving gap in its connection.