- SH3034-2012石油化工给水排水管道设计规范（英文版）
- 中国石油化工集团公司
- 19字
- 2021-03-29 04:34:55
3.8 Earth Cover
The vertical distance from the exterior top of buried pipe or trench to the finished surface.
The vertical distance from the exterior top of buried pipe or trench to the finished surface.