Gas turbine and steam locomotive: what they have in common

1. Step 1. Gas turbine — has part — Compressor. A compressor.
2. Step 2. Compressor — is part of — Air brake. A compressor pumps the air.
3. Step 3. Air brake — is part of — Diesel locomotive. Air brakes.
4. Step 4. Diesel locomotive — evolved from — Steam locomotive. It replaced the steam locomotive.

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