Based on our work practice, the article introduces a parameter selection method for AGC hydraulic system of rolling mills, and analyzes screw down cylinder, power unit and other.
结合工作实践，介绍了轧机压下液压系统的一种参数选择方法，并对压下油缸、油源等进行了分析讨论。
This paper introduces one test method of VOC in refinery units with the practice of petrochemical industry. And, rough calculation on quantity of VOC leak in unit is made according to EPA method.
结合石油化工行业生产的实际，介绍一种炼化装置挥发性有机物检测方法，并依据EPA的计算方法对装置的挥发性有机物的泄漏量进行了估算。
The traditional method, in which a single threshold value(unit price) has been used to determine the transportation mode of corresponding cargo, lacks necessary support from practice.
用单一的临界值来决定不同类商品在国际贸易中运输模式的选择缺乏实践的支持。
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