... precision,Safely self-locking,Heavy duty,Uniform lifting speed,small sizes,easy installation,low noise,long ... 17.Input Horsepower Ranges: 8.Lifting Screw Diameters: 9.Lifting Screw Pitch: 10.Lifting Speed: 11.Accessory: 12. ... Application: Machinery,Metallurgy,Construction, Irrigation, Chemical industry, Health Care, Culture, Health and Others Industries Jwss11-S-R ...