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This units is mainly used in producing the heavy-caliber PE heat preservation tube, and its products are mainly applied to the outer layer of heating pipeline (which its middle layer is the ammonia fat gathering and foaming level, and its inner layer is the steel pipe), besides that the units can produce the delivery pipe, the discharge pipe and so on. The units is mainly composed of the extruding machine, the nose, the cooling water trough, the tractor, the cutter, the card tube machine, the support and the electrical control department etc.
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