Home / Standards / DL/T 5070-1997 DL/T 5070-1997 Active 水轮机金属蜗壳安装焊接工艺导则 Standard Type DL ICS N/A CCS N/A Status Active Issue Date 1997-06-20 Implementation 1997-11-01 Centralized Committee 电力工业部 Issuing Authority 电力工业部