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20230528232805亚洲免费综合色在线视频24. There is no free lunch in the world, and all success depends on one's own efforts. Opportunities need to be grasped and created.
本產品又叫死套，其內層為涂敷在鋼管表面的環氧底漆，中間層為熱熔膠，外層為改良性的輻射交聯聚乙烯基材。加熱時，熱縮套基層收縮、膠層熔化，緊密的收縮包覆在補口處，與原管道防腐層形成一個牢固、連續的防腐體。耐腐蝕，耐磨損、耐沖擊，抗紫外線和光老化性能。
