non-pressure pipe meaning in English

无压管道

Concrete pipes and ancillary concrete products - specification for prestressed non - pressure pipes and fittings with flexible joints
混凝土管和辅助混凝土制品.带软接头的预应力非压力管道和配件的规范
Specification for solvent cements for transition joints between acrylonitrile - butadiene - styrene and poly vinyl chloride non - pressure piping components
丙烯腈-丁二烯-苯乙烯共聚物和聚氯乙烯无压管道系统构件之间转换接头用液状粘固剂规范
Standard specification for solvent cements for transition joints between acrylonitrile - butadiene - styrene and poly vinyl chloride non - pressure piping components
丙烯腈-丁二烯-苯乙烯共聚物和聚氯乙烯无压管道系统构件之间转换接头用液态粘结剂的标准规范