Ceramic glaze and sewage treatment plant: what they have in common

1. Step 1. Ceramic glaze — is part of — Pottery. A vitreous coating.
2. Step 2. Pottery — includes — Porcelain. Ceramics.
3. Step 3. Porcelain — is material for — Flush toilet. Toilet bowls are earthenware and porcelain.
4. Step 4. Flush toilet — uses — Sewerage. Draining the waste.
5. Step 5. Sewerage — has part — Sewage treatment plant. Treatment plants.

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