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甲醚菊酯
First Standard® 杆菌肽
Tetrabutylammonium bromide (无证书)
Iodoquinol
2-Chloroacrylonitrile
4,4'-Diaminodiphenyl ether
3,4,5-Trichlorobiphenyl 标准品
乳胶微粒标准物质,10um
溴氯甲烷
Mercury Chloride (HgCl2) 99.998%(有证书)