Skis and plumbing: what they have in common

1. Step 1. Skis — works like — Snowshoes. Two ways of not sinking into snow.
2. Step 2. Snowshoes — uses — Pressure. It lowers the pressure on the snow.
3. Step 3. Pressure — is used in — Tap. A tap holds back water under pressure.
4. Step 4. Tap — is part of — Plumbing. Taps.

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