... slowness 缓慢 retardent 阻化剂 mental retardation 智力迟钝 ...
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flame retardent glass tape 阻燃玻璃丝布带
fire-retardent coatings 防火涂料
It expatiated the advances in flame-retardent technology of polyolefin.
阐述了聚烯烃阻燃技术的研究进展；
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