Loom bars and oil well: what they have in common

1. Step 1. Loom bars — is part of — Backstrap loom. The ends of the warp.
2. Step 2. Backstrap loom — uses — Plant fibre. Cloth is woven from threads spun from fibres.
3. Step 3. Plant fibre — is material for — Rope. Rope is twisted from plant fibres.
4. Step 4. Rope — is part of — Block and tackle. The rope runs around the pulleys.
5. Step 5. Block and tackle — is part of — Drilling rig. The block and tackle lifts the drill string.
6. Step 6. Drilling rig — is used in — Oil well. A well is drilled by a rig.

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