Natural gas and hammer: what they have in common

1. Step 1. Natural gas — is used in — Thermal power station. Gas.
2. Step 2. Thermal power station — has part — Boiler. Boilers.
3. Step 3. Boiler — is part of — Steam hammer. A boiler supplies the steam.
4. Step 4. Steam hammer — evolved from — Hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.

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