From a purely natural soil produced from non - glazed pottery.

由一种纯天然无釉陶土烧制而成.

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Natural soil is not rigid - plastic body, so limit analysis just only a semi empirical method.

然而天然土体并非刚塑性体, 如果实际的土体离开刚塑性假设太远,则极限分析设计原则就只能当作一种半经验的方法采用.

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Composite foundation is a kind of artificial foundation setting up reinforcement body in natural soil.

复合地基是在自然地基土体中设置加固体的一种人工地基.

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Natural soil thermoluminescence survey whose repeatability is very good can be used in exploring deep deposit.

土壤天然热释光法是一种能达到攻深找盲的方法,而且它的异常重复性很好.

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