一种无色可燃气体,用于焊接和有机合成
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一种无色可燃气体,用于焊接和有机合成
a colorless flammable gas, C2H2, used in welding and organic synthesis
When welding, the worker used carbide gas to cut the metal.
焊接时,工人使用电石气切割金属。
一种无色可燃气体,用于焊接和有机合成
a colorless flammable gas, C2H2, used in welding and organic synthesis
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