fractional crystal lization

• 分步结晶

fractional crystal lization的用法和样例：

例句

1. In this paper a technology of parametric pumping fractional crystallization and a crystallizer with a slug flow vertical bubble tube are presented.
   本文采用参数泵分步结晶新工艺和开发的直立弹状气泡管结晶器提纯制取精萘，则克服了通常方法的缺点。