1. Top drive daily operation consumption/vulnerable parts, seals, as well as repair kits for various mechanical and hydraulic systems; 2. Electric drive system accessories, circuit protection and switching components, circuit control boards, cables and connectors Secondary assemblies, such as flushing pipe assembly, IBOP assembly, hydraulic pump assembly, gear lubrication pump assembly, etc. 3. Secondary assemblies, such as flushing pipe assembly, IBOP assembly, hydraulic pump assembly, gear lubrication pump assembly, etc.