Massive Selection for Hexagon Punch Pins - High Quality Tungsten Caribde Valve Spool /Seat – Shanghai HY Industry
Massive Selection for Hexagon Punch Pins - High Quality Tungsten Caribde Valve Spool /Seat – Shanghai HY Industry,
- 1.Valve seat are malting with cemented carbide ball.
2.Great tightness and wear-resistant.
3.Smooth and glossy slope surface