QL screw jack applications: products are widely used in petrochemical industry, mining, railway, construction, metallurgy and chemical industry, ports, electric power, steel, shipbuilding, automobile manufacturing, plastic machinery, industrial control, highway, heavy transportation, pipeline auxiliary installation, slope tunnel, well management and protection, maritime rescue, marine engineering, airport construction, Bridge, aviation, aerospace, loading and unloading heavy objects, inverted welding of oil tanks, such as various large and medium-sized concrete, the installation and movement of steel structure and mechanical equipment are applicable to the mechanical equipment of infrastructure engineering such as construction installation, slope tunnel, well Channel treatment and protection, important industries such as venues and mechanical equipment of infrastructure engineering.