dbsrhreh

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Across
  1. 2. the use of science to invent useful things or to solve problems
  2. 5. a tool or machine that has a certain purpose
  3. 6. an important discovery after many tries
Down
  1. 1. useful, helpful, or important
  2. 3. the act of writing down words that have been spoken
  3. 4. a way to find unseen objects by using radio signals