一、概述气焊或气割是一种重要的金属加工工艺.它广泛应用于机械、化＿工、电力、造船等工业。气焊用于各种位置焊缝的焊接，如碳钢、低合金钢、铸铁、有色金属等，还用于对薄板及单面焊双面成型的小直径管的全位置焊接。气割用于切割纯铁、低碳钢、型钢、板材等。气焊或气割的 First, an overview Gas welding or gas cutting is an important metal processing technology. It is widely used in machinery, chemical industry, electricity, shipbuilding and other industries. Gas welding is used for the welding of welding seam in various positions, such as carbon steel, low alloy steel, cast iron, non-ferrous metal, etc. It is also used for all-position welding of small diameter pipes with double-sided forming of sheet and single-sided welding. Gas cutting for cutting pure iron, mild steel, steel, sheet and so on. Gas welding or gas cutting