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天井
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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standardized test
standardized training of residents
standardized training of specialist
standardized variable
standardizing the weights and measures system in the Qin Dynasty
standardizing the weights and measures system in the Sui Dynasty
standard kernel
standard labor time
standard lamp
standard land price(or value)modified approach
standard language
standard lens
standard lens, normal lens
standardless analysis
standard library
standard lighting
standard [light] source
standard light source
standard linear solid
standard liquid-in-glass thermometer
standard load
standard log
standard luminance surface
standard magnet
standard manifold
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