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  • Address:Room 202, Jinshan Riches Bld ,Fangzhong Road 2370, Huli District, Xiamen,361009,China

The valve seat is the ring-shaped surface with which a poppet valve closes. A valve seat is the part of the cylinder head that mates with the valve face. Valve seat recession occurs when valve seats wear and the valve sink recedes into the cylinder head....