Level frame and kiln: what they have in common

1. Step 1. Level frame — is part of — Spirit level. A straight base ruler.
2. Step 2. Spirit level — uses — Universal gravitation. The bubble rises to the highest point.
3. Step 3. Universal gravitation — is used in — Water tower. Pressure from height.
4. Step 4. Water tower — is made of — Brick. Water towers are brick.
5. Step 5. Brick — uses — Kiln. Fired brick is stronger than mud brick.

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