Bronze toads with open mouths e esteira transportadora: o que têm em comum

1. Passo 1. Bronze toads with open mouths — faz parte de — Zhang Heng’s seismoscope. They catch the ball when it drops.
2. Passo 2. Zhang Heng’s seismoscope — é feito de — Bronze. A bronze vessel.
3. Passo 3. Bronze — é material para — Helmet. Ancient helmets were copper and bronze.
4. Passo 4. Helmet — é feito de — Leather. Helmet liners and simple helmets were made of leather.
5. Passo 5. Leather — é material para — Esteira transportadora. The first belts were leather.

Abrir Evothings