Due to the different deoxidation methods, the ordinary low alloy steel has excellent performance, which requires that the material must be able to withstand the reciprocating force.

As one of the most stringent components in diesel engine, piston transfers the driving force during its high-speed reciprocating motion and withstands high mechanical load and thermal load.

All of the aerodynamic force must be produced in the absence of any incident flow, meaning lift can only be produced by the powered reciprocating motion of the wing.