兑水 发表于 2009-10-23 15:15:39

ASTM D 6342-1998 聚氨酯原材料标准惯例：近红外(NIR)光谱法...

D6342-98(2003) Standard Practice for Polyurethane Raw Materials: Determining Hydroxyl Number of Polyols by Near Infrared (NIR) Spectroscopy
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