A fabric structure is constructed having a fabric base sheet, a viscidity layer, a polymeric back layer, and a protective layer. The flexible tube is made by sheathing a metallic tubular member with a nonmetallic tubular member. A common shaft having rotatably coupled thereto a booster pump fluidically coupled between the feed pump and the feed inlet and an energy recovery turbine fluidically coupled to the high pressure concentrate outlet. A first base radio transmits a first plurality of data units on the first channel. The magnetic core may include first and second projections extending in opposite directions along the quadrature axis.