Lathe carriage and micrometer: what they have in common

1. Step 1. Lathe carriage — is part of — Lathe. It holds the cutting tool and moves it.
2. Step 2. Lathe — evolved into — Screw-cutting lathe. Maudslay added a lead screw and a slide rest.
3. Step 3. Screw-cutting lathe — has part — Lead screw. The lead screw moves the cutting tool.
4. Step 4. Lead screw — uses — Screw. A lead screw is a screw.
5. Step 5. Screw — is used in — Micrometer. A precise screw with a 0.5 mm pitch.

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