Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings - specification for chlorinated polyvinyl chloride pipes and associated fittings and solvent cement 建筑物家用和采暖装置冷热水用热塑管与相关配件.第4部分:氯化聚氯乙烯管和相关配件及液态粘固剂规范