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First Standard® 甲磺酸培氟沙星
2-Amino-3-methyl-3H-imidazo[4,5-f]quinoxaline
Diethyl phosphorochloridothionate 标准品
POE (10) stearyl alcohol ether
2-Amino-6-fluorophenol
19种油墨中可挥发性有机化合物
Dimethomorph Solution 100ug/ml in Acetonitrile
氮中氧气体标准物质
CAFESTOL(SH) 标准品
Chlorthiophos (Mix of Isomers)