screw jack products widely used in petroleum chemical industry, mine, railway, construction, chemical and metallurgical, ports, electricity, steel, shipbuilding, automobile manufacturing, plastic machinery, industrial control, highway, large transportation, pipeline auxiliary design, slope tunnel, well control door, salvage, ocean engineering, airport construction, bridge, aviation, aerospace, loading and unloading heavy, tank flip chip bonding, such as all kinds of large and medium-sized concrete, steel structure and mechanical equipment installation and removal for in building installation, slope tunnel, well control protection and other infrastructure engineering machinery and equipment, venues and other important industries and infrastructure engineering machinery and equipment.