Well shaft and boyle’s air pump: what they have in common

1. Step 1. Well shaft — is part of — Well. A vertical shaft down to the aquifer.
2. Step 2. Well — uses — Shaduf. Or with a well sweep.
3. Step 3. Shaduf — is used in — Irrigation. The shaduf fed water into the canals.
4. Step 4. Irrigation — includes — Drip irrigation. A kind of irrigation.
5. Step 5. Drip irrigation — uses — Valve. Drippers.
6. Step 6. Valve — is part of — Boyle’s air pump. Valves.

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