Holt tracked tractor and kiln: what they have in common

1. Step 1. Holt tracked tractor — inspired — Tank. The British designers of the first tanks drew on the experience of Holt’s tracked tractors.
2. Step 2. Tank — has part — Composite armour. Multi-layer armour.
3. Step 3. Composite armour — is made of — Porcelain. Ceramic layers.
4. Step 4. Porcelain — is a kind of — Pottery. Ceramics.
5. Step 5. Pottery — uses — Kiln. Firing in a kiln makes clay strong.

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