... A geared trolley hoist is opreated by pulling the hand chain,running on the botton flange of monorail. Trolley hoistModel GCL ... pulling the hand chain,running on the botton flange of monorail, and the interval between the wheel fringes can be ... becomes a conveyer.Precaution:1.Before you use the hoist,please do remember to check the hooks and bodies, ... out of the place undef the loading. Trolley hoist