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Term 1: Term 2:

(subclass RealNumber Number) Merge.kif 1891-1891 实数数字subclass
(subclass RationalNumber RealNumber) Merge.kif 1911-1911 有理数实数subclass
(subclass IrrationalNumber RealNumber) Merge.kif 1916-1916 无理数实数subclass
(subclass NonnegativeRealNumber RealNumber) Merge.kif 1921-1921 非负实数实数subclass
(subclass NegativeRealNumber RealNumber) Merge.kif 1943-1943 负实数实数subclass
(subclass BinaryNumber RealNumber) Merge.kif 2003-2003 二进制数实数subclass


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