乙炔：最简单的炔(C2H2)，无色可燃气体，广泛用作金属焰焊接和切割的燃料，也是合成许多有机化学品和塑料的原料。

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.

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当采用氧乙炔焰或等离子切割时，切割后必须除去影响焊接质量的表面层。

If oxyacetylene flame or plasma is adopted, surface coat that can impact welding quality shall be removed after cutting.

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当采用氧乙炔焰或等离子切割时，切割后必须除去影响焊接质量的表面层。

If oxyacetylene flame or plasma is adopted, surface coat that can impact welding quality shall be removed after cutting.

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