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覆盖层
1、decarburized layer───[化工]脱碳层
2、cuticular layer───表皮（层），角化层；表皮层
3、mucus layer───粘液层
4、outer layer───外层（细胞次生壁外面的一层）
5、dense layer───[医]致密层
6、clayey layer───粘土层
7、oxide layer───氧化层
8、layer───vt.把…分层堆放；借助压条法；生根繁殖；将（头发）剪成不同层次；n.层，层次；膜；[植]压条；放置者，计划者；vi.形成或分成层次；[植]通过压条法而生根
9、overburden───n.岩石覆盖；过重负担；v.（使）负担过重；给……过多工作（或压力）
1、the wide vertical shaft should be adopted when the overburden layer is relatively thick.───在覆盖层较厚时采取了宽竖井施工方案。
2、Discussion on chamber excavation construction method in deep overburden layer───深厚覆盖层洞挖施工方法探讨
3、At the same conditions, collapse occurs most easily in overburden layer with mixing structure.───在相同条件下具有混杂结构的覆盖土层最易产生塌陷；
4、This kind of strata is distributed widely in the Quaternary overburden layer of mountain riverbeds and mountain sloping field.───这类地层广泛存在于山区河床，山前坡地等第四系覆盖层中。
5、In deep overburden layer exploration, the result of a sole geophysical method is usually lower reliability.───在深厚覆盖层勘探中，单一物探方法的结果通常可靠性较低。
6、Bedrock and overburden layer covered the high slope behind the workshop building. The high slope needed research about its stability.───厂房后缘边坡多基岩LuoLu，下游侧为覆盖层边坡，谷坡高陡，边坡稳定问题需要进行计算和研究。
7、Study on river diversion and erosion control under condition of narrow river bed, large discharge per unit width, depth overburden layer───狭窄河床大单宽流量深覆盖层施工导流消能防冲研究
8、indicated that the characteristics of overburden layer, development degree of karst and activities of groundwater have important influence on the formation of karst collapse.───结果表明，覆盖层特征、岩溶发育程度、地下水等对岩溶塌陷的产生有着重要影响。
9、collapse of overburden layer and land surface due to underground mining is one kind of environmental hazards induced by human being.───覆岩及地表塌陷是涉及全球性人为环境灾害之一。
1、The results are as follows: First, it can reflect variation of thickness of covering layer and the duration of propagation time of the shear wave in overburden layer.