SBR latex for paving with solid content 45% was prepared by the vacuum con centration process with viscosity depressant and outside circulationheating.
用减粘剂法釜式（卧式蒸发器）外循环加热真空浓缩工艺生产了固体物质量分数为45 %的道路胶乳。
2
According to the statements of configuration characteristic of water tank, this paper analyzes its application in nature and mechanism circulationheating system.
本文通过对水箱结构特点的阐述，分析了其在自然循环供暖系统、机械循环供暖系统中的具体应用。
3
Generally forced convection circulationheating device taking gas as heat transmission medium requires high temperature uniformity. So it is very important for selection of fans and control method.