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  1. Test Tube: Working, Types, and Uses - Master Chemistry

  2. Test tube - Wikipedia

  3. Test Tube: Types Uses, and Importance • Microbe Online

  4. Test Tubes: Types, Use, Disadvantages - Science Info

  5. Test Tube | Definition, Purpose & Uses - Lesson | Study.com

  6. Test Tube – A Comprehensive Guide for Everyone - labwale.co

  7. Test Tubes: Types, Uses, and Laboratory Applications

  8. Laboratory Test Tube – Definition, Types, Uses

  9. Test Tubes Selection Guide: Types, Features, Applications

  10. Resources :: Test Tube | Smithsonian Learning Lab