seam roof meaning in English

顶盖岩
煤层的顶板

Study and practice on supporting technique in coal seam roof
煤层顶板支护技术的研究与实践
Base test method for purlins supporting a standing seam roof system
固定接缝屋顶系统承重檩条的基本试验方法
Application of fuzzy synthesis evaluation to coal seam roof stability
模糊综合评判在煤层顶板稳定性评价中的应用
Test and research on bolt and wire mesh support for mine roadway with broken seam roof
破碎煤顶巷道锚网支护试验研究
Contour map of seam roof
矿层顶板等高线图

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