1) roof lithology
顶板岩性
2) roof and floor lithologic
顶底板岩性
1.
Researches on No.9 coal seam and its roof and floor lithologic in the eastern part of Jincheng coal mining area;
晋城矿区东部9号煤层及其顶底板岩性的研究
3) slate roof
板岩顶板
6) roof overburden
顶板覆岩
1.
Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face;
综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究
补充资料：连续性与非连续性(见间断性与不间断性)
连续性与非连续性(见间断性与不间断性)
continuity and discontinuity
11an父ux泊g四f“山。麻以角g、.连续性与非连续性(c。nt，n琳t:nuity一)_见间断性与不间断性。and diseo红ti-
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条