... in same time 2 easy operation 3. pipe diameter 16-40mm PVC dual pipe production machine:1) It is mainly used in ... tank, haull-off, cutter, stacker or belling machine etc.3) The extruder and haul-off machine adopt the imported AC frequency control device ... pump and hauling motor employ superior goods.4) Haul-off machine of different specifications, such as two caterpillars, three caterpillars, four ...