The presence of geological units of gas under control of rock mechanical properties, fault distribution, seam thickness.
各自然地质单元瓦斯赋存情况受其围岩力学性质、断层分布、煤层厚度等地质因素控制。
Tectonic group patterns of coal seam depended on tectonic stress field, mechanical properties of rock of coal-bearing formation and surrounding environments.
煤层的构造组合型式在很大程度上取决于构造应力作用、含煤地层的岩石力学性质和应变环境等。
The finite element results and experimental results of the fracture properties of concrete with different ages and initial seam height ratios are compared.
分析比较了不同龄期和不同初始缝高比时普通混凝土的开裂性能，并与试验结果进行了对比。
The requirements of dimensions, mechnical properties, surface quality on aluminium alloy seam tubes are explained.
介绍了本标准的编制过程及对有缝管材尺寸偏差、力学性能、表面质量等方面的规定。
A study was carried out on the microstructure of interface and welding seam in dual-metal clad steel pipe. And its inferences on technological and service properties were studied.
通过金相分析、微区成份分析、宏观和微观断口分析，主要研究钎焊层和焊鏠区的微观结构及其对复合钢管工艺性能和使用性能的影响。
A study was carried out on the microstructure of interface and welding seam in dual-metal clad steel pipe. And its inferences on technological and service properties were studied.
通过金相分析、微区成份分析、宏观和微观断口分析，主要研究钎焊层和焊鏠区的微观结构及其对复合钢管工艺性能和使用性能的影响。
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