Mother well shaft e hammer: o que têm em comum

1. Passo 1. Mother well shaft — faz parte de — Qanat. A vertical shaft down to the aquifer.
2. Passo 2. Qanat — utiliza — Gravity flow. Water flows by gravity.
3. Passo 3. Gravity flow — é utilizado em — Water wheel. Falling or flowing water turns the wheel.
4. Passo 4. Water wheel — faz parte de — Trip hammer. The shaft was turned by a water wheel.
5. Passo 5. Trip hammer — evoluiu de — Hammer. A trip hammer is a hammer lifted and dropped by a water wheel.

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