P3R1E1I1G2N1I1T1I1O1N1S1
15 points
PREIGNITIONS is validvalid
PREIGNITION,
PREIGNITION, ignition in an internal combustion engine while the inlet valve is open or before compression is completed
PREIGNITION,
PREIGNITION, ignition in an internal combustion engine while the inlet valve is open or before compression is completed