Polyethylene structure wall pipeline system for underground usage part 1 : polyethylene double wall corrugated pipes 埋地用聚乙烯pe结构壁管道系统第1部分：聚乙烯双壁波纹管材
2.
Plastics piping systems with structured wall pipes for soil and waste discharge low and high temperature inside buildings . unplasticized poly vinyl chloride . guidance for the assessment of conformity 建筑物内的粪水和废物排放用的带结构壁管道的塑料管道系统低温和高温.非增塑聚氯乙烯.一致性评价指南
