Planimeter e hydraulic press: o que têm em comum

1. Passo 1. Planimeter — tem como parte — Wheel. A measuring wheel computes the area.
2. Passo 2. Wheel — inclui — Water wheel. A water wheel is a wheel with paddles turned by flowing water.
3. Passo 3. Water wheel — faz parte de — Trip hammer. The shaft was turned by a water wheel.
4. Passo 4. Trip hammer — evoluiu para — Steam hammer. The mechanization of forging.
5. Passo 5. Steam hammer — evoluiu para — Prensa de forja. Pressing instead of striking.
6. Passo 6. Prensa de forja — é um tipo de — Hydraulic press. A press.

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