Transfer case and plumbing: what they have in common

1. Step 1. Transfer case — is part of — SUV. It splits torque between the axles.
2. Step 2. SUV — uses — Four-wheel drive. Four-wheel drive.
3. Step 3. Four-wheel drive — uses — Axle. Four-wheel drive sends engine power to both axles, front and rear.
4. Step 4. Axle — is part of — Yo-yo. The axis between the discs.
5. Step 5. Yo-yo — is made of — Clay. Greek yo-yos were terracotta.
6. Step 6. Clay — is material for — Plumbing. Minoan plumbing used ceramic pipes.

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