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Wang Dongming; Zhu zhuoyuan(Department of Geophysics, Beijing Univeraity, 100871 )  
In this paper the notions and theories of isoparamtric functions and isoparametrichypersurfaces are introduced, the generalized concept of parallelism is presented. It'sproved that parallel gravity field is one of planar field, spherical field and cylindric field,the theoretic misclosure of geometric levelling vanishs in parallel gravity field;Undisturbed earth's gravity field under the status of hydrostatic equilibrium is parallel gravity field, and its distribution of mass density is spherically Symmetric.
【Fund】: 国家自然科学基金!49484002
【CateGory Index】: P312.1
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Chinese Journal Full-text Database 1 Hits
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