oxy·acet·y·lene /ˌɑksiəˈsɛtḷən, tḷˌin/
  (a.)氧乙炔的
  oxyacetylene
       adj : of or using a mixture of acetylene and oxygen; "an
             oxyacetylene torch"; "oxyacetelyne welding"
       n : a mixture of oxygen and acetylene; used to create high
           temperatures for cutting or welding metals