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香溪煤系
湖北中西部、鄂东南及川东北地区下侏罗统香溪群或香溪组含煤地层。
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principal diameter
principal dielectric axes
principal direction
principal direction of curvature
principal discrete series
principal disjunctive normal form
principal distribution parameter
principal divisor
principal dual ideal
principal element
principal element elimination
principal elliptic term
principal enumeration
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principal escaped point
principal factor
principal fiber bundle
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principal fibration
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principal fractional ideal
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