1. Lightweight and easy to carry.3. Easy to maintain and safe and reliable to use.4. Simple structure, but low transmission efficiency and slow return...
A mechanical jack is a type of manual lifting tool. It features a compact structure and utilizes the swing of a rocker lever to rotate a pinion. This,...
Ordinary screw jacks rely on the self-locking action of the threads to support heavy objects. While simple in construction, they suffer from low trans...