基岩是冲积层之下较坚硬的岩石,一般是灰岩、花岗岩、砂岩和页岩等。其表面是致密的黏土层,通常称为假底。当基岩为灰岩时,矿床底板常呈现四凸不平,也称喀斯特底板,使矿床开采困难。
n. substratum
misc. basic level ; grass roots ; primary level ; basement layer
浅谈公路工程水泥石屑混合料稳定层的质量控制 - 中国月期刊网 关键词:水泥石屑稳定混合料;基层;质量控制 [gap=234]Key words: stability of the cement stone chip mixture; base; Quality Control
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强化基层药品技术监督在药品监管中作用/医药护理综合论文_医药护理论文_范文百科 关键词】药品;基层;技术监督;作用 [gap=301]Keywords】drug;grass-roots;technologicalsupervision;effect
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基层民主 grassroots democracy ; local democratic system; community-level democracy ; primary-level democracy ; basic level democracy
基层群众自治制度 systems of community-level self-governance; the system of community-level self-governance ; the system of community-level self-governance ; Community-level self-governance ; the system of people's self-governance at grassroots
基层组织 community organizations ; community-level Party organizations ; Grassroots Organizations
基层民主自治体系 communitylevel democratic self-governance ; community level democratic self-governance
强基层 strengthen community-level medical services
基层政权 community-level governments
基层医疗机构 community-level medical institutions ; Primary health care institutions ; medical establishment of basic unit ; Basic unit medical establishment
基层民主制度 local democratic systems
基层民主协商 democratic consultation at the community level
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