ww1 technology

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Across
  1. 4. handheld bomb
  2. 5. 400/500 bullets or rounds shot a minute
  3. 8. a long ditch dug in the ground
  4. 9. used in dogfights
  5. 10. made blisters that oozes yellow fluid
Down
  1. 1. an underwater boat
  2. 2. a metal cable with sharp spikes
  3. 3. a gun shooting fire
  4. 6. filled lungs with water
  5. 7. helped break stalemates