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  1. Acetylene - Wikipedia

  2. Acetylene | C2H2 | CID 6326 - PubChem

  3. Acetylene | Description, Properties, & Uses | Britannica

  4. Acetylene (C2H2) - Structure, Molecular Mass, Properties ...

  5. Acetylene: Properties, Reactions And Toxicology

  6. Acetylene - Encyclopedia.com

  7. What is Acetylene? (with pictures) - AllTheScience