Porsche surface coated brakes

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Across
  1. 1. Strong metal that is used mostly in structural material
  2. 4. Wolframi in english
  3. 6. synonym for maintaining machines
  4. 7. Thin layer or covering of something
Down
  1. 2. Person who designs and builds machines
  2. 3. Opposite of acceleration
  3. 5. Common unit for temperature