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First Standard® 倍氯米松
16种农残混标 Bepure-33501YA
氟草胺 BePure-20541XM
甲醇中伏草隆
PUNYW25533293 Ethacrynic Acid-d5
GPC标样-聚苯乙烯磺酸钠(Mw 7500)(阴离子,窄MWD) 标准品
Lufenuron Solution in Acetonitrile
2-Methylnaphthalene 标准品
羟基甲硝唑
Phosphorus from KH2PO4 @ 1000ug/ml in water(有证书)