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露天矿中进行剥离和采矿作业的矿岩水平层。
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上下台基之间的阶梯。一般指用砖、石、混凝土等材料连接不同标高地面之间的踏步及构件。
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National Education Association
National Electronic Commerce Demonstration Base
National electronic commerce demonstration base
National Electronic Publication Award
National Electronic Records Administration Joint Inter-ministry Conference
national emblem
National Emblem of Australia
National Emergencies Act
national emergency industry demonstration base
national emergency management information system
national emergency management information system, NEMIS
national emergency plan for geological disasters
National Endowment for the Arts
National Energy Program
National Engineering Lab. for Chemical Utilization of Biomass
National Engineering Research Center for Information Technology in Agriculture
National Engineering Research Center of Chemistry of Forest Products
National Engineering University of Peru
National Entrance Test of English for MA/MS Candidates
National Environmental Policy Act of 1969
National Environmental Policy Act of the United States of America
National Environmental Protection "12th Five-Year" Program Environment and Health Work Plan
National Environmental Protection "12th Five-Year" Science and Technology Development Planning
national environmental protection model city system
national environmental protection pilot city
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