Winch drum and truck: what they have in common

1. Step 1. Winch drum — is part of — Windlass. A cylinder on which the rope is wound.
2. Step 2. Windlass — is part of — Crane (ancient). The rope was wound on a windlass.
3. Step 3. Crane (ancient) — has part — Block and tackle. The crane lifted loads with a block and tackle.
4. Step 4. Block and tackle — is part of — Drilling rig. The block and tackle lifts the drill string.
5. Step 5. Drilling rig — has part — Diesel engine. The drive.
6. Step 6. Diesel engine — is part of — Truck. A diesel engine.

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