The product is a kind of lifting part small size,ease to install,in the fo rm of multi-put,high reliability,long life Detaiied Production DescriptionJFSJ Series Worm Screw Jacks is one model of basic hoisting parts and has numerous features of comp act structure, small volume, light weight, wide drive sources, low noise, high reliability, long lifespan, etc In addition, they are easy to be ...