1.crane spare 2.heavy duty 3.used for electric hoist,LH,QD,MH Model crane 4.manufature The coiling block ... and steel structure.It is widely used ,such as electric hoist,trolley,LH ,QD,QZ,MH Model crane.These below are the ... block is suitable for crane hoisting institutions such as electric hoist,it has different kinds of film.The winding manderl will ...