氢氧焰 qīngyǎngyàn oxyhydrogen flame / oxyhydrogen burner Origin Definitions Defs Strokes Stroke Words Sentences Sents 氢氧 氫氧 qīngyǎng oxyhydrogen a mixture of hydrogen and oxygen gas, typically in a ratio of 2:1, used in high-temperature torches for welding and cutting焰 yàn noun flame (bound form) flame; blaze; firelight