Qingdao Lutongda Plastic Machinery Co.,Ltd specializes in manufacturing high capacity and excellent quality plastic machinery equipment over ten years . Our main product lines now include: 1) High speed extruders 2) Single/twin screw extruders 3) PP-R,PE-RT material pipe production line 4) PE carbon Spiral Reinforcing Pipe production lines 5) SJSBGZ Plastic single and double wall corrugated pipe extrusion line 6) Mono-wing labyrinth type drip irrigation belt production