Semaphore arm e industrial robot: o que têm em comum
- Passo 1. Semaphore arm — faz parte de — Railway semaphore. The position of the arm is the signal.
- Passo 2. Railway semaphore — evoluiu para — Traffic light. The first traffic light was a railway-style semaphore.
- Passo 3. Traffic light — tem como parte — Relay. Relay controllers.
- Passo 4. Relay — evoluiu para — Programmable logic controller. It replaced relay cabinets.
- Passo 5. Programmable logic controller — é utilizado em — Industrial automation. Controllers.
- Passo 6. Industrial automation — utiliza — Industrial robot. Robots.