GBT5836.1-2018 建筑排水用硬聚氯乙烯(PVC-U)管材.pdf
建筑排水用硬聚氯乙烯(PVC-U)管材Unplasticizedpoly(vinylchloride)(PVC-U)pipesforsoilandwastedischargeinsidebuildings2018-12-28发布20...
GBT5836.1-2018建筑排水用硬聚氯乙烯(PVC-U)管材.pdf
