The test results show that it is technically feasible to separate silver from crude bismuth by vacuum distilla- tion instead of traditional Parke's process of desilverization(zinc desilverization).
本文研究了粗铋真空蒸馏脱银的可能性及规律性。
Diagnosis of one power plant #1 LP steam turbine s fourth stage blades lacing wires crackles and lacing wires silver brazing breaking down;
某发电厂1号汽轮机低压第4级叶片拉筋大面积银焊脱落、脱焊、拉筋开裂原因分析
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