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在极破碎岩层或不稳定第四系地层中掘进井巷时,为保证掘进作业正常进行并预防工作面发生坍塌,在开挖之前或超前于掘进工作面采取的预先加固措施。
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Levy process
Levy Prohorov distance
Levy-Prohorov distance
Levy stable non Gaussian distribution
Levy stable non-Gaussian distribution
Levy walk
Lewanika Concession
Lewdness is the worst of all sins
Lewin's change model
Lewin变革模型
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Lewis acid
Lewis adduct
Lewis Alfred Coser
Lewis and Clark Expedition
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Lewis Bernstein Namier
Lewis blood group substance
Lewis Carroll
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Lewis complex
Lewis Henry Morgan
lewisite
Lewis model
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