Bronze and air conditioner: what they have in common

1. Step 1. Bronze — is material for — Heron’s aeolipile. The aeolipile is a bronze ball.
2. Step 2. Heron’s aeolipile — evolved into — Turbine. The aeolipile is the oldest ancestor of the steam turbine.
3. Step 3. Turbine — is part of — Gas turbine. A turbine.
4. Step 4. Gas turbine — has part — Compressor. A compressor.
5. Step 5. Compressor — is part of — Air conditioner. A compressor.

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