In the area of environmental protection, recycling corrugated products easy to exonerate the soil coated Board.
在环保方面，瓦楞产品容易回收再生，免除对涂布纸板的土埋要求。
Rc slab culvert, circular culvert and alloy steel corrugated culvert are applicable to the secular frozen earth area.
钢筋混凝土盖板涵、圆管涵和合金钢波管涵等都适应于多年冻土地区。
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