Its anticorrosion mechanism, methods of preparation and composite modification are summarized.介绍了聚苯胺涂层的防腐蚀机理, 制备方法及其复合改性的情况.They have the characteristics of strong intensity, light material , airtight, anticorrosion, agi...
我们从井里抽水以供日用.We pump water from the well for daily use.他们正在采集节日用花.They are gathering flowers for the festival.食物、燃料和其他日用必需品仍然很难得到。It remained very difficult to procure food, fuel and other daily necessities....