converging paper chromatography

• 圆锥形纸色谱

converging paper chromatography的用法和样例：

例句

1. A cone-shaped paper hat formerly placed on the head of slow or lazy pupils.
   以前一种戴在迟钝或懒惰的学生头上的锥形纸帽。
2. A cone-shaped paper hat formerly placed on the head of slow or lazy pupils.
   以前一种戴在迟钝或懒惰的学生头上的锥形纸帽。