Turnstile e hammer: o que têm em comum

1. Passo 1. Turnstile — faz parte de — Metro. Turnstiles.
2. Passo 2. Metro — utiliza — Tunnelling shield. Metro tunnels were built with shields.
3. Passo 3. Tunnelling shield — utiliza — Hydraulic cylinder. The shield was pushed forward by jacks.
4. Passo 4. Hydraulic cylinder — faz parte de — Prensa de forja. Working cylinders.
5. Passo 5. Prensa de forja — evoluiu de — Steam hammer. Pressing instead of striking.
6. Passo 6. Steam hammer — evoluiu de — Hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.

Abrir Evothings