Manual gearbox and internal combustion engine: what they have in common

1. Step 1. Manual gearbox — is a kind of — Transmission (gearbox). A gearbox.
2. Step 2. Transmission (gearbox) — is part of — Military jeep. A gearbox and a transfer case.
3. Step 3. Military jeep — has part — Internal combustion engine. A petrol engine.

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