Two or More rotating rollers gradually compress a tube forcing liquid through the tube just ahead of each roller. The tube shape We offer Trolley i.e. Transport Trolley and Material Trolley that are used to carry material such as bricks, sand aggregate from one place to another.Two or More rotating rollers gradually compress a tube forcing liquid through the tube just ahead of each roller. The tube shape We offer Trolley i.e. Transport Trolley and Material Trolley that are used to carry material such as bricks, sand aggregate from one place to another....Show More