内容标题5

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                  直通

                  1.因为它是由无塑性硬质氯乙∴烯制成的,所以它具有较⌒好的耐腐蚀性,不需要担心腐蚀。2.富有弹性,在地震∑ 的时候等发挥有效的强度。3.由于使用的是无塑硬质氯乙烯树脂,材料稳定,显示出氯乙烯中较好ζ的耐候性。4.内表面光滑,摩擦系数♀小,水垢Ψ粘附小,流【量阻力小。