The production line is mainly used in producing PVC, PE multiple-hole pipe. The produced pipes is widely used in laying optical cable.
本生产线主要用于生产PVC、PE多孔管，生产的管子广泛适用于穿、放光电缆。
Combined with the strengthening reconstruction project of Songyang River oblique multiple-hole in Hubei, the disease phenomena, reasons and developing process of the kind bridge were analyzed.
结合湖北省松阳河斜交连孔拱桥的加固改造工程，研究分析了该类桥的病害现象、病害原因及发展过程。
Combined with the strengthening reconstruction project of Songyang River oblique multiple-hole in Hubei, the disease phenomena, reasons and developing process of the kind bridge were analyzed.
结合湖北省松阳河斜交连孔拱桥的加固改造工程，研究分析了该类桥的病害现象、病害原因及发展过程。
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