Fixed vise jaw and watt steam engine: what they have in common

1. Step 1. Fixed vise jaw — is part of — Vice. Fixed to the body.
2. Step 2. Vice — uses — Screw. The jaws are closed by a screw.
3. Step 3. Screw — is used in — Jack. A screw jack.
4. Step 4. Jack — has part — Piston pump. A hand plunger pump.
5. Step 5. Piston pump — evolved into — Watt steam engine. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.

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