氢氧混合气 Oxyhydrogen
（重定向自Oxyhydrogen flame）
氢氧是氢气(H2)和氧气(O2)按2:1摩尔比例混合的混合物，这个比例和水中氢和氧的比例相同。这气体混合物是用于制作耐火材料的火炬上，而且是最初用作焊接的气体混合物。在练习时需要用4:1或5:1的氢氧比例，以免产生氧化焰。
Oxyhydrogen flame
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英语百科
Oxyhydrogen 氢氧混合气
（重定向自Oxyhydrogen flame）
Oxyhydrogen is a mixture of hydrogen (H2) and oxygen (O2) gases. This gaseous mixture is used for torches to process refractory materials and was the first gaseous mixture used for welding. Theoretically, a ratio of 2:1 hydrogen:oxygen is enough to achieve maximum efficiency; in practice a ratio 4:1 or 5:1 is needed to avoid an oxidizing flame.
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