Cam and newcomen engine: what they have in common

1. Step 1. Cam — is part of — Trip hammer. Cams on the shaft lift the hammer.
2. Step 2. Trip hammer — evolved into — Steam hammer. The mechanization of forging.
3. Step 3. Steam hammer — has part — Boiler. A boiler supplies the steam.
4. Step 4. Boiler — is part of — Newcomen engine. Steam from the boiler.

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