Semaphore arm e industrial robot: o que têm em comum

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

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