1.In accordance with API 4F,8A and 8c specifications.
2.The sheave rope groove goes through quenched processing with wear-resiatance and long life.
3.Equipped with bump-proof cushion devices.
4.The traveling sheaves of the crown and its auxiliaries can be exchanged with each other.
2.The sheave rope groove goes through quenched processing with wear-resiatance and long life.
3.Equipped with bump-proof cushion devices.
4.The traveling sheaves of the crown and its auxiliaries can be exchanged with each other.