FIELD: internal-combustion engines. SUBSTANCE: spark plug has unit-cast insulating-material body, central electrode fitted in axial hole of body, and side electrode, both electrodes forming spark gap. Spark plug body is made of corundum ceramics; threaded portion and end surface of body on combustion chamber side are metallized; side electrode is welded to metallized surface of body. EFFECT: facilitated manufacture. 2 cl, 2 dwg
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|---|---|---|---|
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