Pressure cooker e hammer: o que têm em comum
- Passo 1. Pressure cooker — tem como parte — Safety valve. Papin invented the safety valve precisely for his digester.
- Passo 2. Safety valve — faz parte de — Caldeira. A mandatory safeguard for boilers.
- Passo 3. Caldeira — faz parte de — Steam hammer. A boiler supplies the steam.
- Passo 4. Steam hammer — evoluiu de — Hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.