Milking machine and jacquard loom: what they have in common

1. Step 1. Milking machine — has part — Vacuum pump. A vacuum pump.
2. Step 2. Vacuum pump — has part — Check valve. Valves stop air from flowing back.
3. Step 3. Check valve — is part of — Bellows. An air intake valve.
4. Step 4. Bellows — is part of — Player piano. Pedal bellows create suction.
5. Step 5. Player piano — works like — Jacquard loom. A perforated medium controls a machine — a weaving one in one case, a musical one in the other.

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