Method for measuring deviation of joint position of member and method for producing spark plug

In a method for measuring deviation of a ground electrode from an optimal igniting position, a metallic shell is engaged with a female thread jig. Then the axis O of the metallic shell, a predetermined first measuring point P1 and a predetermined second measuring point P2 on a front end face of the...

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1. Verfasser: OZEKI ATSUSHI
Format: Patent
Sprache:eng
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