随着热循环次数增加，垂直裂纹网格变密。
The mesh density of vertical cracks increased following thermal cycles.
该文通过试验和理论计算两种方法研究了高压下煤粉密相气力输送垂直管段的压力损失情况。
This paper presents pressure drops for vertical pipe in dense-phase pneumatically conveying pulverized coal under high pressures by a method of experimentation and analytical calculation.
根据实验结果及分析，对垂直立管的管形设计和催化剂在垂直立管中的密相输送提出了分析与建议。
Based on the experimental results and analysis, the idea and principle about design of standpipe shape and dense-phase transportation of catalyst in the standpipe were presented.
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