A brassiere cup has inner and outer geometrically similar cup parts fitting in each other and having confronting inner faces and outer faces directed away from each other. After pre-treatment of the raw material, the fibrous fraction is first hydrolysed at high consistency and then the modified material is subjected simultaneously to continued hydrolysis with a cellulase and to ethanol fermentation in a fermentation mixture. The foregoing technical solution can implement the Un subframe configuration of the eNB and the RN and improve communication quality. The second layer surrounding the sphere is generally made of a natural rubber or synthetic polymer or a combination of each which is surrounded by an outer cover made of an ionomer, urethane or balata.