The merits of the acetylenegas and the defects of new type of welding gas are completely mixed together on the aspect of theory and practice.
理论和实践上把乙炔气的优点和新型焊割气存在的缺点完整的捏合在一起。
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Acetylene (ethyne) Simplest alkyne, C2H2. A colourless, flammable, explosive gas, it is used as a fuel in welding and cutting metals and as a raw material for many organic compounds and plastics.