... hole boring machine, large hone grinder, large NC lather, lathe, external grinding machine, and automatic welder machine.2) The Hydraulic ... are pump cylinder, excavator cylinder, self-dumping cylinder, dump truck cylinder, hydraulic pounding cylinder, tower crane cylinder, special-purpose car cylinder, hydraulic clipper cylinder, etc.3 ... . Komatsu/Volvo/Kobelco/Caterpillar excavator hydraulic cylinder