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1 pencil of tangent spheres
Математика: пучок касательных сферУниверсальный англо-русский словарь > pencil of tangent spheres
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2 pencil of tangent spheres
English-Russian scientific dictionary > pencil of tangent spheres
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3 pencil
1) карандаш || карандашный2) пучок•- locally orientable pencil - pencil of parallel planes - pencil of parallels - pencil of relative differentials
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