Twisted rope strands and watt steam engine: what they have in common

1. Step 1. Twisted rope strands — is part of — Rope. Twisted bundles of fibre.
2. Step 2. Rope — evolved into — Wire rope. A steel counterpart of rope.
3. Step 3. Wire rope — is part of — Mine hoist. Mine ropes were the first use of wire rope.
4. Step 4. Mine hoist — has part — Watt steam engine. Steam winding engines.

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