But its weak damp proofing requires that a special ventilated system and dampness damping system must be available, otherwise it could lose its functions due to erosive penetration.
但其不耐潮的特性则必需配用特别的屋面通风排潮系统，否则可能被腐蚀穿透而失去使用功能。
The categories and properties of the perfluoroalkyl monomers were introduced in detail. They could be used as retanning agent, finishing agent, fatliquor, water-and stain-proofing agent etc.
介绍了皮革工业中常用的含氟单体的类别及其结构特征，以及其在复鞣剂、涂饰剂、防水防污剂、加脂剂等方面的应用和研究进展。
A novel dust proofing agent for dyestuff was prepared by the addition of industrial fatty acid and glycol epoxide, which could produce a kind of emulsor.
采用工业脂肪酸和环氧乙烷加成法研制成乳化剂，进而获得一种新型染料防尘剂。
A novel dust proofing agent for dyestuff was prepared by the addition of industrial fatty acid and glycol epoxide, which could produce a kind of emulsor.
采用工业脂肪酸和环氧乙烷加成法研制成乳化剂，进而获得一种新型染料防尘剂。
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