预应力深井管钢圈，500圆度平度标准材质易打孔，尺寸重量可定做

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Pre-resilient deep well pipe steel coils, 500-degree flat standard materials perforated and size wei

No tin hong botai metal products ltd

Address:168 money road, north pond district, tin-free city (622 b-barrel metal market)
Tel:13771512158

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13771512158