GB 12897-1991

Abolished

Specifications for the first and second orderleveling

国家一、二等水准测量规范

Standard Type
GB
ICS
07.060
CCS
A76
Status
废止
Issue Date
1991-05-05
Implementation
1992-01-01
Responsible Dept
自然资源部（测绘地理）
Drafting Unit
N/A