Screw jack 1. Made in GuangZhou 2. ISO9001:2000 System Guarantee ... compact, small size, easy to intall, in the form of multi-input, high reliability,long life etc..The product ... is a kind of lifting parts, and other series worm gear screw lift compared with a compact, ... with axes things forward, reverse,and so on a variety of functions, one or more combinations to use, machinery, water, ...