1) double sleeve structure
双重管
1.
By using a double sleeve structure,the effect of self-excited vibration on drag reduction is investigated under the condition of applying water and air outside the tube with pressure equivalent almost to the inner tube pressure.
为寻求具有减阻效能的流体管路输送技术,采用双重管结构,在对柔管壁外侧分别加以几乎与管内压力相平衡的水及空气的条件下,对柔管的自激振动减阻效果进行了实验研究。
2) Double-intubation
双重插管
4) double venturi
双重喉管
5) duplication of supervision
双重监管
6) double insulation pipe
双重保温管
1.
In th e paper, the underwater repair technique for double insulation pipe is introduce d based on the underwater repair project of sub-sea pipeline in Weizhou oil fie ld.
结合涠洲油田海底管道修复工程的实例 ,介绍海底双重保温管道的水下维修技术。
补充资料：管山吃山﹐管水吃水
1.比喻干什么事情﹐就靠什么生活。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条