According to the material, spark plugs can be divided into nickel alloy spark plugs, platinum spark plugs, iridium spark plugs and iridium platinum spark plugs. In terms of service life, the service life of nickel alloy spark plug is 30000 km, that of iridium spark plug is 40000 km, that of platinum spark plug is 60000 km, and that of iridium platinum spark plug is 80000 km. If subdivided, spark plugs can also be divided into standard spark plugs, rim protruding spark plugs, electrode spark plugs, seat type spark plugs, and electrode spark plugs. 1. Quasi type
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