Home / Standards / HG 20539-1992 HG 20539-1992 增强聚丙烯(FRPP)管和管件 增强聚丙烯(FRPP)管和管件 Standard Type HG ICS 71.120 CCS G94 Status N/A Issue Date 1993-01-18 Implementation N/A Responsible Dept 化学工业部 Drafting Unit N/A