Float glass and knife: what they have in common

1. Step 1. Float glass — uses — Tin. Glass spreads out over molten tin.
2. Step 2. Tin — is material for — Ice cream maker. Inside is a tin cylinder.
3. Step 3. Ice cream maker — has part — Crank. A handle.
4. Step 4. Crank — is part of — Meat grinder. A handle.
5. Step 5. Meat grinder — has part — Knife. A cross-shaped blade.

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