->

                                                                                Cangzhou Spiral Steel Pipes Group Co.,Ltd.

                                                                              1. Polypropylene 3PP anticorrosive spiral steel pipe Polypropylene 3PP anticorrosive spiral steel pipe

                                                                                3PP anti-corrosion refers to the three-tier pipeline PP anti-corrosion structure: the first layer of epoxy powder (FBE), the second layer of adhesive (AD), the third layer of polyethylene (PP). Where 2PP does not contain the first layer. Th......

                                                                                2PP / 3PP anti-corrosion steel pipe 2PP / 3PP anti-corrosion steel pipe

                                                                                2PP / 3PP anti-corrosion steel pipe Two PP, three PP anti-corrosion layer of performance indicators 3PP Anticorrosion: Pipeline three PP anti-corrosion structure: the first layer of epoxy powder (FBE50-400um), the second layer of adhesive (......

                                                                                    12條記錄
                                                                                19禁无遮挡啪啪无码网站_中文亚洲无线码欧美_免费特黄一区二区三区视频_亚洲男人第一无码av网站