Technology of ancient china

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Across
  1. 4. Navigational instrument.
  2. 5. elemental sulfur, charcoal, saltpeter
  3. 7. Ancient Chinese dishes
Down
  1. 1. used for lifting heavy objects.
  2. 2. Chinesetherapy
  3. 3. the ancient Chinese invented this.
  4. 6. what method was used for making bronze vases?