01.100.99;75.160.30;93.025 标准查询与下载

DIN 2425-3:1980 公共设施、水源和长途线路规划图.长途线路规划图.DVGW技术条例(德国燃气和水工程师协会）

Plans for Public Utilities, Water Resources and Long-distance Lines; Plans for Long-distance Pipelines, Technical Regulation of the DVGW (German Gas and Water Engineers Association)