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mass of material with high densita'to be applied appropriately to the inner surface of the shell part of objects of common use.cylindrical shell is more or less elongated in cross-section and circular variously tapered, and which forces the subject, once left alone on a flat surface.to always take
mass of material with high densita'to be applied appropriately to the inner surface of the shell part of objects of common use.cylindrical shell is more or less elongated in cross-section and circular variously tapered, and which forces the subject, once left alone on a flat surface.to always take