The deformation value of coal body can be served as a criterion for predicting the risk of coal outburst, as well as an assessment of the effect of degassing measures in coal seams.
变形值可以作为预测煤体突出危险性的一项指标，并可用于预测抽放瓦斯措施的效果。
The effect of ultrasonic degassing under different time of A356 Aluminum alloy is studied by using vacuum decompress test, and the effect of ultrasonic field on the solidification microstructure.
以a356合金作为实验材料，通过真空减压试验考察超声场对金属气体去除效果的影响，研究超声场对铝合金凝固组织的影响。
The effect of melt treatment method on degassing efficiency of ultrasonically refined pure aluminum ingots was investigated. Furthermore, the mechanism of ultrasonic degassing was analyzed.
研究了不同的熔体处理方法对纯铝铸锭超声波除气的影响，分析了影响超声波除气效果的原因。
应用推荐