Starting element having ceramic component electrostatically...
Structure of spark plug achieving high degree of air-tightness
Structure of spark plug designed to provide high thermal...
Structure of spark plug designed to provide higher wear...
Structure of spark plug designed to provide higher...
Structure of spark plug designed to provide higher...
Structure of spark plug ensuring stability in location of...
Surface gap igniter
Surface gap type igniter plug
Surface-gap spark plug for internal combustion engines