Professional China Tungsten Carbide Rotary Burrs - Cemented Carbide Valve Spool – Shanghai HY Industry
Professional China Tungsten Carbide Rotary Burrs - Cemented Carbide Valve Spool – Shanghai HY Industry,
- 1.Valve seat are malting with cemented carbide ball.
2.Great tightness and wear-resistant.
3.Smooth and glossy slope surface