KD3-5 Hand-cranking Span Top/mechanical Jack

ChinaCoal05 Hand-cranking span top/mechanical jack is the way of manual lifting tool, it can in a variety of projects and equipped with lifting falling-rising as roof is hand force through the gears, drive the lifting or falling. When unloading heavy or down, left to move the ratchet will crank reverse rotation, manual control its speed, so as to better apply to the factory, warehouse, dock, railway, construction stack, etc, especially suitable for mobile installation of