The oil pressure jack (hydraulic pound top) is a small distance raising tool that uses the principle of Pascal to transfer power with hydraulic oil. The mechanical jack (mainly referring to the spiral jack) is a kind of leveraged principle. It reasonably uses the swing of the joystick to rotate the small gear. It runs through a pair of conical gear to drive the screw to rotate, promote the lifting sleeve, and thus rising heavy objects to rise. Or decline. Which is more labor -saving? Oil pressure -type is relatively labor -saving during use. Which is more durable? The mechanical is relatively durable, and the oil pressure type may have a problem of leakage. Which is better? This problem is relatively general, it is relative. Mechanical has a self -locking function, which is more suitable for long -term uplift work. For example, when the tank construction is installed, the object needs to be promoted, so that mechanical types are often selected for subsequent work. In the use of oil pressure, it can save effort, suitable for short -term rise. For example, when we use the car on the car, most of the people use oil pressure when they are replaced by tires.