Toothbrush e rolling mill: o que têm em comum

1. Passo 1. Toothbrush — tem como parte — Handle. A plastic handle.
2. Passo 2. Handle — faz parte de — Hammer. A handle.
3. Passo 3. Hammer — evoluiu para — Trip hammer. A trip hammer is a hammer lifted and dropped by a water wheel.
4. Passo 4. Trip hammer — tem como parte — Water wheel. The shaft was turned by a water wheel.
5. Passo 5. Water wheel — é utilizado em — Rolling mill. The first mills were turned by water.

Abrir Evothings