Transmission (gearbox) e needle: o que têm em comum

1. Passo 1. Transmission (gearbox) — faz parte de — Tractor. A transmission.
2. Passo 2. Tractor — utiliza — Steel plough. Ploughing with a tractor.
3. Passo 3. Steel plough — evoluiu de — Plough. A steel share.
4. Passo 4. Plough — evoluiu de — Hoe. The plough mechanized loosening the soil with a hoe.
5. Passo 5. Hoe — evoluiu de — Stone tool. Neolithic hoes of stone and antler.
6. Passo 6. Stone tool — evoluiu para — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.

Abrir Evothings