environment protectional polyurethane waterproof coating 环保聚氨酯防水涂料
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To investigate the protectional mechanism of the prescription.
探讨该方对胃黏膜的保护作用机制。
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A kind of environment protectional benzene-propyl later paint, which was suit to coat inner wall was prepared.
研制了一种适用于内墙涂装的环保型苯-丙乳胶漆。
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