Water chlorination and hammer: what they have in common

1. Step 1. Water chlorination — is used in — Water treatment plant. Chlorination.
2. Step 2. Water treatment plant — has part — Centrifugal pump. Pumping stations.
3. Step 3. Centrifugal pump — is part of — Central heating. A circulation pump.
4. Step 4. Central heating — has part — Boiler. A boiler.
5. Step 5. Boiler — is part of — Steam hammer. A boiler supplies the steam.
6. Step 6. Steam hammer — evolved from — Hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.

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