【机械工程】火花放电，产生震波，金属成形

spark discharge

spark ignition installation internal-combustion engine

spark ignition, electric with two or more sparking plugs for internal-combustion engines

internal-combustion engine, electric spark ignition

expulsion lightning arrester, Wien's spark gap

spark plug wire

spark ignition installation, piezo-electric internal-combustion engine

spark chronoscope