1, Salt bath nitride treated surface and satellite welding for wear resistance. 2, Material: Heat-resistant steel alloy 1) Intake Valves: 40Cr, 4Cr9Si2 2) Exhaust Valves: 4Cr9Si2(SUH1), 21-4N(SUH35) 3, Specifications: 1) diameter: 16-60mm, 2) Valve...
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engine valve, oilless bearing, piston, pistong ring, cylinder head...
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