Mass spectrometer and refrigerator: what they have in common

1. Step 1. Mass spectrometer — has part — Vacuum pump. A vacuum system.
2. Step 2. Vacuum pump — is part of — Vacuum sealer. A pump.
3. Step 3. Vacuum sealer — is used in — Sous vide. Vacuum bags.
4. Step 4. Sous vide — uses — Thermostat. A precise temperature.
5. Step 5. Thermostat — is part of — Refrigerator. A thermostat.

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