16861-250PEG4000Resin250gPolys... 进口试剂采购网

p1Src=//y1.yzimgs.com/uploads/469100/20181122-144725920.jpg?watermark/2/text/6L-b5Y-j6K-V5YmC6YeH6LSt572R/font/5a6L5L2T/fontsize/400/fill/I0E3QTlBOA==/gravity/SouthEast"

aa