Founded in 2001, Chongqing Haifeng Science And Technology Development Co., Ltd. is a high-tech enterprise combining R&D, PCT patent licensing, transferring, executing and serving based on own intellectual property rights and technology.With the innovation and study, we have successfully developed the technology of producing hard polyvinyl chloride(PVC) spiral pipes of 300-2500mm in diameter, which fills up the void of large caliber pipe...
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