Teflon and stone tool: what they have in common

1. Step 1. Teflon — is material for — Bread machine. A non-stick coating.
2. Step 2. Bread machine — is used in — Bread. Baking at home.
3. Step 3. Bread — uses — Quern. Flour was ground on millstones.
4. Step 4. Quern — is a kind of — Stone tool. A quern is two stones: the upper one is turned on the lower to grind grain.

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