p萃淋树脂 p 507-extraction chromatograph resin ; p 507-containing resin ; p 204 extraction resin

p萃取树脂 p 507 extractive resin ; p 507 extracting resin

聚酯树脂P Polyester resin P5127

聚氯乙烯树脂P Polyvinyl chloride resin P-2500