The aim was to research the sound absorption properties of graded polyurethanes at incident angles.
主要研究梯度聚氨酯在全入射角下的吸声性能。
INFRARED STUDIES OF THE ALIPHATIC SEGMENTED POLYURETHANES
脂肪族聚氨酯的红外光谱和氢键
EHC formulates polyurethanes in a broad range of durometers, depending on your requirements.
依合斯根据您的需求制造不同硬度 的轮子。
Primer for durable systems with wide range of topcoats， including polyurethanes and acrylics.
可与多种面漆包括聚氨酯及丙烯酸类面漆配套。
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