A、plane tangent at one point
B、cylinder tangent at the equator
C、cone tangent at one parallel
D、infinite series of cones tangent at selected parallel
A、plane tangent at one point
B、cylinder tangent at the equator
C、cone tangent at one parallel
D、infinite series of cones tangent at selected parallel
时间:2022-01-05 16:38 关键词: 航海学基本知识
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