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shaft lining
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shaft lining
Encyclopedia
工学
竖井支护
释
shaft lining
竖井支护
为控制地层压力,维护井筒围岩稳定,防止井筒变形开裂、漏水,沿竖井岩壁构筑支护结构的作业活动。
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quadripartition
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quadruple metal-metal bond
quadruple of points
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quadruplex Ligand complexe
quadruplex-Ligand complexe
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