1·These include mass ratio of metallic powder to chromium trioxide and technological parameters of paint throwing off, drying and sintering processes.
金属粉与铬酐的质量比、甩液、烘干和烧结工艺参数。
2·A new cleaner technology for making chromium trioxide and potassium nitrate simultaneously by using nitric acid to decompose potassium dichromate has been brought forward.
提出了硝酸分解重铬酸钾法联产铬酸酐与硝酸钾的清洁工艺，并优选出过程中主要环节的合理操作条件。
3·Pyridine can react with halogens, nitronium fluoroborate, sulfur trioxide, boranes and chromium trioxide to form some useful organic reagents which are introduced briefly in the paper.
吡啶可以和卤素、 硝基四氟化硼盐、 三氧化硫、 硼烷及三氧化铬反应，形成一些有用的有机试剂。