This paper briefly introduces the ingredients of deinking agents and their functions.简要地介绍了本厂脱墨剂的组成、作用及使用效果.At present, traditional alkaline deinking method is used in most deinking plant.目前, 大多数工厂采用的是传统碱性脱墨方法.In this ar...
虾青素分子结构中含有13个共轭双键, 是一种极不稳定的类胡萝卜素.Astaxanthin molecular structure which contains 13 conjugated double bonds, is one kind of extremely unsteady carotenoid.综述了近10年来虾青素结构、功能及应用方面的研究成果与进展.This article reviews the research pro...
This is a great drawing by one of the 19th century's finest draughtsmen.这幅恢宏画作出自一位19世纪最杰出的画家之手。Draughtsmen make drawing on a drawing board, a pencil a T - square , set square and scale.绘图员用铅笔 、 丁字尺、三角板和比例尺在绘图板上绘图....