?上下行层析

preserved context index system(PCIS) 释义：保留上下文索引系统 ascending-descending chromatography 释义：上下行层析(法),上下行色谱(法),升降色谱(法) centric maxillomandibular record 释义：正中上下颌关系记录 ..

?上下行色谱

... 撂下行李 put down the luggage 上下行色谱 ascending-descending chromatography 上下行型 ascending-descending type ...