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  3. For a spark plug M 14 x 1.25 the last fi...
Q.

For a spark plug M 14 x 1.25 the last figure 1.25 stands for

A. Gap between electrodes in mm
B. Pitch of plug thread
C. Electrode diameter in mm
D. Tip width in mm
E. Size of plug thread
Answer» B. Pitch of plug thread
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