In this paper, the author introduces the optimum collection of the adhension, colour and volumematerial, and the principal specifications of self-cleaning exterior wall paint HW4.
本文介绍了研制的自洁外墙涂料hw4的基料和颜填料的优选及主要性能。
2
This process is termed "replacement" because solutions have dissolved the original material and replaced it with an equal volume of the new substance.
这个过程被称为“置换”，因为溶液溶解了原来的物质，并用等量的新物质取而代之。
3
Each volume in the set explores a wide range of material, explains the basic concepts of major applications of digital systems, and discusses the influences they have on everyday life.