打火石相关论文
日本工业技术院名古屋工业试验所理学博士柴田正三先生应中国有色金属工业总公司北京有色金属研究总院的邀请,于1983年11月16—22......
稀土,又称作镧系元素,它成为工业材料还不超过10年。当然,用混合稀土金属制造的打火石、铈抛光剂、作高折射低分散玻璃成份的氧化......
一、八十年代的展望日本七十年代的稀土的市场逐步在荧光材料、抛光材料、光学玻璃、磁体、球墨铸铁、打火石等方面扩大,1979年已......
一、概述我国稀土资源极为丰富,储量大,品种全,遍及十八个省区,可谓得天独厚。但解放前我国稀土工业是个空白,连打火石都要靠进口......
1.进口(单位:kg,括号内为金额,单位:千E1元,CIF)种类肢吲家(地区)8月 1～8月氧化钇中 【刊 116000(1 26971)法旧 1 3600(20061)合it......
商品名称出口量/t创汇额/万美元1998199919981999稀土金属、钪和钇未相混合和熔合物5893.0(5893.0)6279.7(6279.7)4973.05429.8稀......
铸造25%铅和30%铅的铅青铜是用于高温高压的轴承材料.由于铜和铅的熔点相差极大,固溶度又极小,铸造时容易产生“逆偏
Lead castin......
本文介绍了稀土发火合金的原料、生产工艺、质量与产量;简述了该合金的应用情况;阐明了产品的国内外市场,针对存在问题提出了一些......
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《希区柯克与特吕弗对话录》不是一般意义的采访,而是心灵与心灵的碰撞,智慧与智慧的交锋,就像黑暗中的两块打火石在不停地敲击,不......
