Home / Standards / GB 13476-1999 GB 13476-1999 Abolished Pretensioned spun concrete piles 先张法预应力混凝土管桩 Standard Type GB ICS 91.100.30 CCS Q14 Status 废止 Issue Date 1999-07-30 Implementation 2000-02-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A