... used for conveying sewage and sludge, the sea, and other media.4, compression: the technique requirements, design and manufacture of ... by computer, in accordance with the provisions in the mandrel glass fiber winding with the same process manufacturing lining, gel according ... fibers, continuous glass fiber and quartzite.Update Date:2010/6/10 2:13:14 FRP pipe grp pipe fiber glass pipe Nanjing LeJie ...