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llb A gasket for the engine is installed between two engine parts, such as between a cylinder head and a cylinder black. Since high pressure and temperature are applied to the gasket in the engine, a metal or metal laminate gasket are widely med. In view of the weight and economy of the gasket, the gasket is made as thin as possible. In a metal or metal-laminate gasket, in order to securely seal around a hole to be sealed, a metal plate is often provided with a bead and/or turning portion around the hole to thereby provide a high surface pressure. A grommet may be installed around the hole
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This patent is concerned with the duo-cone type of mechanical face seal that is used in earthmoving equipment applications. Elastic layers (28, 29) are used on the conical surfaces of the seal rings and housing respectively. The purpose is to inhibit entrainment of debris.