Interchangeable parts und watt steam engine: was sie gemeinsam haben

1. Schritt 1. Interchangeable parts — wird verwendet in — Egreniermaschine. Whitney was one of the promoters of interchangeable parts.
2. Schritt 2. Egreniermaschine — hat als Teil — Kurbel. The drum was turned by a handle.
3. Schritt 3. Kurbel — ist Teil von — Watt steam engine. The stroke of the piston becomes rotation of a shaft (Watt first used a planetary gear).

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