短语词组短語coagulant -aid 助凝劑polyelectrolyte coagulant aid 聚電解質助凝劑anion coagulant aid 隂離子助凝劑organic coagulant aid 有機助凝劑;有機高分子助凝劑coagulant aid and precipitant aid 助凝助沉劑 返回 coagulant aid