The product is a kind of lifting part small size,ease to install,in the form of multi-put,high reliability,long life Detaiied Production DescriptionJFSJ Series Worm Screw Jacks is one model of basic hoisting parts and has numerous featur es of compact structure, small volume, light w eight, wide drive sources, low noise, high reli ability, long lifespan, etc.. In addition, they are easy to be ...