Mail type cylinder Hydraulic cylinders include a variety of welded cylinders (compact). Mail Type, Tyrad, Compact and Custom. Roxan Parsian Company offers a variety of hydraulic cylinders, including the Mail Type cylinder. It is also capable of designing and manufacturing jacks and hydraulic cylinders. A hydraulic jack is a machine in which a force is applied to an oil in a small cylinder. This force causes the incompressible oil to be transferred to the large cylinder. The oil puts pressure on the large cylindrical piston and causes the load on the cylinder to rise. The working system of crane machines, and 2, is such that, while simple, it performs many useful tasks with high efficiency. In the hydraulic jack system and construction, it is important that the oil is almost impermeable and transmits the force exerted on it. Also, the pressure on the small piston is practically transferred to the large piston and directs it upwards. Uses of Hydraulic Jack: In moving and lifting heavy machinery, compressor machines, cranes, refineries, underground drilling, tower construction and architecture, all devices and vehicles from this machine are very simple and practical or work system It is used.