usb试剂 21060 1 KG RAFFINOSE 21060 100 GM RAFFINOSE
usb试剂 20605 1 GA TWEEN 20 20605 500 ML TWEEN 20
usb试剂 20100 1 KG DL-PHENYLALANINE 20100 100 GM DL-PHENYLALANINE
usb试剂 20048 1 LB BACTERIOLOGICAL PEPTONE POWDER
usb试剂 20037 25 MG PEPSTATIN A POWDER 20037 5 MG PEPSTATIN A POWDER
usb试剂 20015 1 KG PEPSIN 1:10000 PORCINE STOMACH PWD