... Clamshell Grab YP4[0.]1.56-00 Detailed Product Description Electric Hydraulic Clamshell Grab YP4[0.]1.56-00 1)Open and close with hydraulic cylinders 2) ... severe circumstances.It ia mainly designed for handing of power and fine bulk materials such as chemicals,fertilizer,grain, ... in ports,steel plants,power stations,ships and garbage treatment,plants,and is used together with tower cranes,ship cranes, ...