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过去十年涉及大口径砼排水管的市政工程和高速公路项目呈急剧上升趋势 ,而利用世界银行贷款和亚洲开发银行贷款的项目更是特别注重砼管的质量和接头可靠性。丹麦佩德哈博公司自５０年前开发用于干法生产低压砼管的芯模振动工艺以来 ,不断完善和发展该工艺 ,生产出的管子强度更
In the past ten years, municipal projects and highway projects involving large-diameter concrete drainage pipes have shown a rapid upward trend, while projects using World Bank loans and Asian Development Bank loans have paid special attention to the quality and reliability of joints. The Danish company Pedehabo has continuously perfected and developed this process since it developed a mandrel vibrating process for the dry-fabrication of low-pressure helium tubes 50 years ago.