Crossword puzzle

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Across
  1. 4. the placing of parts of an electric circuit in contact
  2. 7. a thing that is difficult to achieve
  3. 10. a point at which parts are joined
  4. 12. process of making something
  5. 13. process to force from a straight form into a curved
  6. 14. an object have made from smaller...(what?)
  7. 15. a photograph made by taking intermittent exposures of a moving object
  8. 17. system of parts working in a machine
  9. 20. kind of cyclogram
  10. 21. metal or wood (what are these?)
  11. 24. move quickly
  12. 25. a time when you are building the model
Down
  1. 1. science and technology concerned with the design, building, and use of engines
  2. 2. is also called mechatronic engineering
  3. 3. a main part of machinery were you input the codes
  4. 5. is the process of creating a screw thread
  5. 6. a length or portion of time
  6. 8. a quantity having direction
  7. 9. the ability of a physical product to remain functional
  8. 11. the degree of internal heat
  9. 16. is cyclogram mechanism which can be represented as vector polygons
  10. 18. kind of cyclogram
  11. 19. an example of building a part in 3D
  12. 22. the quality of being correct or precise
  13. 23. a group of commands or its elements