A.the removal of oleophilic impurities only
B.the removal of oleophobic impurities only
C.the removal of both oleophilic and oleophobic impurities
D.the purposes other than the removal of oleophobic or oleophilic impurities
A.the removal of oleophilic impurities only
B.the removal of oleophobic impurities only
C.the removal of both oleophilic and oleophobic impurities
D.the purposes other than the removal of oleophobic or oleophilic impurities