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简述了化学试剂级铬酸钡在钨系延期药中的使用及存在的问题，介绍了一种易分散性铬酸钡在钨系延期药中使用的优越性。
The use of chemical reagent grade barium chromate in tungsten-based delayed-release medicine and its existing problems are briefly described. The advantages of using an easily dispersible barium chromate barium in delayed-acting tungsten-based medicine are introduced.