C18

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Across
  1. 4. - Maximum amount that can be contained
  2. 6. - Shining with a flickering or gleaming light
  3. 7. keys - Individual buttons on a keyboard representing letters
  4. 9. - A separate and individual portion or part
  5. 10. - Waterproof boots made of rubber
  6. 12. - Person trained for space travel
Down
  1. 1. - Strip of material used for covering and protecting wounds
  2. 2. - Involving risk or potential harm
  3. 3. - Actions or devices conveying information
  4. 5. key - Button on a keyboard for going to next line, return key
  5. 8. - sounds made by horses
  6. 11. - Geometric shape with a rounded or elliptical outline