GB/T 32434-2015
ActivePlastics pipes and fittings—Butt fusion jointing procedures fortpolyethylene (PE) pipes and fittings used in the construction of gas and water distribution systems
塑料管材和管件 燃气和给水输配系统用聚乙烯(PE)管材及管件的热熔对接程序
塑料管材和管件 燃气和给水输配系统用聚乙烯(PE)管材及管件的热熔对接程序