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d라이브러리

"cobalt"(으)로 총 2건 검색되었습니다.

일본의 기술과학동아 l1991년 01호

to conduct a current with 100 percent efficiency, with zero loss in heat.Thus, a mixture of oxides of the metals cobalt, manganese, titanium and niobium could be superconductive at temperatures ...

박테리아 광부들과학동아 l1990년 08호

economically smelted by human beings.When the bacteria have gnawed away at the mineral for a while, 10 percent of the cobalt content can be easily dissolved out, So far, the people at the Idaho ...