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HDPE Double Wall Corrugated Pipe Sn4 Sn8 Sn12.5 Sn16, Smooth Inner Wall Underground Sewage Stormwater Plastic Culvert Pipe DN110-DN1200 for Municipal Engineerin, Find Details and Price about Double Wall Corrugated Pipe HDPE Double Wall Corrugated Pipe from HDPE Double Wall Corrugated Pipe Sn4 Sn8 Sn12.5 Sn16, Smooth Inner Wall Underground Sewage Stormwater Plastic Culvert Pipe DN110-DN1200 for Municipal Engineerin - Wenzhou Quanguan Electric Co., Ltd.