Methods for chemical analysis of bauxite ores--The N-benzoyl-N-phenylhydroxylamine extraction photometric method for determination of vanadium oxide content是什么意思_Methods for chemical analysis of bauxite ores--The N-benzoyl-N-phenylhydroxylamine extraction photometric method for determination of vanadium oxide content在线翻译_英语_读音_用法_例句