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строительное дело
прожигание отверстий в бетоне кислородным копьём (кислородной горелкой)
общая лексика
газообразный кислород
A thermal lance, thermic lance, oxygen lance, or burning bar is a tool that heats and melts steel in the presence of pressurized oxygen to create very high temperatures for cutting. It consists of a long steel tube packed with alloy steel rods, which serve as fuel; these are sometimes mixed with aluminum rods to increase the heat output.