nitrogenizevt.使氮化;使含氮
nitrogenn.氮
nitrogen cylinder氮气瓶
nitrogen-oxygen氮-氧
nitrogenous group含氮基团
nitrogen alloying氮合金化
Nitrogen Chloride三氯化氮
nitrogen canister液氮罐
nitrogen dilution氮稀释, 氮气稀释
nitrogen storages氮贮量
nitrogen selenide一氮化硒
nitrogen fixationn.[化]固氮(作用)