The mass spectra of ureide-type noncyclic polyethers with 2(3H)-benzoxazolone as end groups were studies.
研2(3H)-苯并唑酮为端基、具有酰脲结构环多醚化合物质谱。
A raw rubber for millable polyether polyurethane elastomer was prepared.
研制一种聚醚聚氨酯生胶。
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You wouldn't think I'd be the type of person to find psychic relief in the intricacies of the urethane polyether polyol trade, but I did.
你不会认为我会是那种在杂的聚酯聚醚贸易中找到心理解脱的人,但我做到了。
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