Schwing Concrete delivery pipe with twin wall 45Mn2, 20#,Q235 Brand: Schwing, PM, Sany, ... Kyokuto Cubic: 50,000~ 1. We are a professional manufacturer of concrete ... ball, piston, cylinder, eye-glass plate, cutting ring, concrete placing boom, and so on 2. We have been supplying ... 010006inch HD/ZX-6inch F/MOthers Schwing Concrete delivery pipe with twin wall