Ignition coil and newcomen engine: what they have in common

1. Step 1. Ignition coil — is part of — Internal combustion engine. The coil supplies high voltage to the spark plugs.
2. Step 2. Internal combustion engine — has part — Piston. The burning mixture pushes the piston.
3. Step 3. Piston — is part of — Newcomen engine. Atmospheric pressure moves the piston.

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