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碳化焰 tànhuà yàn
met. carbonizing flame; carburizing flame
railw. carburizing flame (reducing flame, 还原焰)
tech. acetylene reducing flame; reducing flame
碳化
tech. carbonized flame
碳化焰
: 6 phrases in 5 subjects
Aviation1
Metallurgy2
Racing and motorsport1
Shipbuilding1
Technology1