When melting cast iron f or rollers in main frequency induction furnace,the recarburization of the molte n iron could be effectively achieved by using new types of recarburizer.
用工频

炼铸铁轧辊时,采用
型增碳剂可以有效

铁液的增碳问题。
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Feeling that the future peace of the world would depend upon relations between the United States and Russia, he devoted much thought to the planning of a United Nations, in which, he oped, international difficulties could be settled.
罗斯福感觉到未来的世界和平将取决于美国和俄罗斯的关系,于是他投入大量精力致力于建立联合国,一个可以解决国际问题的组织。