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连接上下两个中段,提升或下放设备、工具和材料,或者用于通风、行人及探矿等目的的简易井筒。是在非煤矿山的矿块内,沿矿床掘进直立或倾角较大的简易井筒。位于中段以上的倾角较大的简易井筒又称上山,位于中段以下的倾角较大的简易井筒又称下山。
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Second Latin American Episcopal Conference
second law of cosines
second law of thermodynamics
second lemniscate constant
second Lemoine circle
second level cache
second magnetization peak effect
second main light
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second mathematical theorem of quantum mechanics
second mean value theorem
second mean value theorem of integral
second member
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second messenger theory
second method of Lyapunov
second mid-arc point
second modernity
second moment method
second moment of area
second moment of inertia
second Morley adjunct triangle
second Morley center
second Morley cubic
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