main seam detail 主煤层
main seam of shanxi formation 山西组主煤层
main roadway for single seam 单煤层大巷
main coal seam 主煤层
upper main coal seam 上主煤层
main roadway in coal seam 煤巷永久巷道
From rock strength, the main seam roof is divided into extra-high intensity, high intensity, middle intensity, and low intensity.
从岩石强度方面把煤层顶板分成强度特高型、强度高型、强度中等和强度低型。
Seam also USES Hibernate annotations for data validation, so you must include that extension jar in addition to the main Hibernate jar.
Seam还使用Hibernate注释用于数据验证，所以除了主hibernate jar之外，还必须包括那个扩展jar。
Cavern development is the main controlling factor of high productivity and large reserves amount, while fracture development improves connectivity of seam cavern system.
溶洞发育是较高产能和较大储量规模的主控因素，而裂缝发育扩大了缝洞系统的连通性。
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