- 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
- 22字
- 2021-03-29 04:34:55
3.9 Buried Depth
The vertical distance from the interior bottom of buried pipe or trench（to the finished surface）.
The vertical distance from the interior bottom of buried pipe or trench（to the finished surface）.