FREMGANGSM TE FOR FREMSTILLING AV EN TERMISK OG MEKOEYT BELASTBAR SAMT VARME-KORROSJONSBESKYTTET GASSUTVEKSLINGSVENTIL FOR EN TUNGOLJEDREVET FORBRENNINGSMOTOR
1. Method of manufacturing a gas exchange valve with a high heat and mechanical resistance, and protected against corrosion, for a combustion engine using heavy oil, on the valve disc (1) of which an armoured valve seat is made in such a way that armoured material (3) introduced into a circumferenti...
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