... zone of mobility 活动带 zone of negative pressure 负压层 zone of opacity 不透明带; 不透明区; 不透明区域; 暗带; 暗区 ...
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调节引风机，使上箱体中床层物料上部保持微负压，维持良好的干燥环境并防止粉尘外泄（略）。
Fan regulation, which box on the bed material to maintain the upper-vacuum, maintain good dry environment and prevent dust leakage.
处理后的数据参与控制运算，实现流化床床层温度、炉膛负压、烟气含氧量等控制回路的自动调节功能。
The system uses intelligent PID controller to design automatic control loops, including pressure of incinerator, percentrage of oxygen in gas.
提出了用负压吸附涂料层的方式测试涂料透气性的新方法，并推导出了在该方法下计算涂料透气性的数学表达式。
This paper presents a new method in which the coating layer is absorbed by low vacuum for determining the permeability of coating used in casting.
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