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生物地层面
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biostratigraphic horizon
生物地层面
上、下生物地层特征有重要而显著变化,或本身具有独特生物地层特征的面或薄层。简称生物面。又称界面、界线、基准面、关键面等。
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design of supply chain network
design of system of systems
design of the intelligent system of protective engineering
design of transformation
design of tunnel portal
design of tunnel underground structure
design of ultrasonic machining system
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design requirements of dikes in ancient China
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