The collection similar product essence, the quality is steadier.

Lowly walks the ripe time, may enter directly high speed spins the sand.

The specialized production line, the geometry shape is more precise.

Plates the fluorine new craft, the surface is smoother.

After the strict computation, the runway design is more reasonable.

The drop controls the gas carburizing, the equipment is more advanced.

Carbonitriding degree of hardness high, the service life is longer.