Weekly Challenge #15

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Across
  1. 3. Programable logic controller
  2. 4. A device used in gas cutting for controlling the gases used for preheating and the oxygen used for cutting the metal(two words)
  3. 6. A mixture with metallic properties composed of two or more elements, of which at least one is a metal
  4. 7. Number system with a base of 2
Down
  1. 1. The metal to be welded or cut. In alloys, it is the metal present in the largest proportion.(two words)
  2. 2. Metal to be added in making a weld
  3. 4. Houses and connects PLC components
  4. 5. Number System with a base of 8