Pickup truck bed and chisel: what they have in common

1. Step 1. Pickup truck bed — is part of — Pickup truck. An open body.
2. Step 2. Pickup truck — has part — Internal combustion engine. An internal combustion engine.
3. Step 3. Internal combustion engine — has part — Piston. The burning mixture pushes the piston.
4. Step 4. Piston — is part of — Rock drill. A percussion piston.
5. Step 5. Rock drill — is used in — Tunnel. Driving the Mont Cenis tunnel.
6. Step 6. Tunnel — uses — Chisel. Hezekiah’s Tunnel was cut by hand with chisels.

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