This paper focuses on mixing cement concrete batching at how to improve the preparation of precision pneumatic valves, and how to accurately control the concrete slump constant.
主要论述拌和水泥混凝土配料时如何提高气动闸门的配料精度，如何比较准确地控制混凝土的坍落度。
Especially in the explosion-proof mixing equipment using the latest and most advanced pneumatic discharge device design theory.
尤其是在防爆混合设备上采用最新最先进的气动出料装置设计理论。
The current widespread use of the powder conveying way is to screw conveyor conveying, large mixing floor has adopt pneumatic conveying and scraper conveyor.
目前普遍采用的粉料输送方式是螺旋输送机输送，大型搅拌楼有采用气动输送和刮板输送的。螺旋输送的优点是结构简单、成本低、使用可靠。
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