Dumbbell and jacquard loom: what they have in common

1. Step 1. Dumbbell — uses — Universal gravitation. Weight.
2. Step 2. Universal gravitation — is used in — Warp-weighted loom. The warp threads are tensioned by weights.
3. Step 3. Warp-weighted loom — is a kind of — Loom. An ancient loom.
4. Step 4. Loom — includes — Jacquard loom. A loom with punched cards.

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