Pallet deck boards and cannon: what they have in common

1. Step 1. Pallet deck boards — is part of — Pallet. Boards on which the load is placed.
2. Step 2. Pallet — uses — Friction. The load is held on the deck by friction.
3. Step 3. Friction — is used in — Flintlock. A spark from a strike of flint.
4. Step 4. Flintlock — is part of — Musket. A flintlock.
5. Step 5. Musket — evolved from — Hand cannon. A hand-held gun.
6. Step 6. Hand cannon — evolved into — Cannon. A large hand cannon.

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