external circulating evaporator
... 固定式刮板薄膜蒸发器 constant-clearance scraper film evaporator 离心式薄膜蒸发器 centrifugal film evaporator 外循环式蒸发器 external circulating evaporator ...
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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。
SBR latex for paving with solid content 45% was prepared by the vacuum con centration process with viscosity depressant and outside circulation heating.
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