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一、概述氮基气氛具有很长的历史,国外50年代以前就己开发应用,但到70年代中期发生能源危机以后才得到迅速发展。
I. Overview The nitrogen-based atmosphere has a long history. It was developed and applied abroad before the 1950s but rapidly developed only after the energy crisis hit the mid-1970s.