我国建筑业将大力推广应用新型塑料压力管材,逐步减少并将最终禁止镀锌钢管和铸铁管在工程施工作业中的使用。 在最近举行的钢塑PO复合管和三型聚丙烯 China’s construction industry will vigorously promote the use of new plastic pressure pipe, and will eventually reduce and will eventually ban the use of galvanized steel pipe and cast iron pipe in construction work. In the recently held steel-plastic PO composite pipe and three types of polypropylene