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1·The effects of surfaces tension and gravity drainage on heat transfer of fin flanks are considered in the theoretical model.

对翅侧的换热，既考虑到表面张力的影响，又考虑到重力的作用。

2·The steam?assisted gravity drainage(SAGD) process with various types of well configurations has been successful for recovering it.

各种布井方式的蒸汽辅助重力泄油开采这类稠油已获成功。

3·It took costs and pains to design and construct the outdoor gravity drainage system when complicated topography and longer pipelines were encountered.

进行室外污水重力排水设计、施工时，遇到复杂地形或管线较长时，既费成本又废心血。

4·While the retrofit system is applicable to most production scenarios, it has found the most applications to date in steam-assisted gravity drainage (SAGD) Wells.

该装置可以用于多种生产情况，但是其在蒸汽辅助重力泄油(SAGD)系统中使用时效率最高。

5·Compared with gravity drainage system, it has the advantages of small pipe diameter and installing space, non-sloped suspended pipe, less sewage connecting and underground pipes and etc.

与重力排水系统相比，具有管径小、管道安装要求空间小、悬吊管无坡度、下水道连接管和埋地管少等优点。

6·Compared with gravity drainage system, it has the advantages of small pipe diameter and installing space, non-sloped suspended pipe, less sewage connecting and underground pipes and etc.

屋面雨水排水采用虹吸排水系统较重力排水系统，具有管径小、所需管道安装空间小、悬吊管道无坡度、下水道连接管和埋地管少等优点。

7·Normally, the cumulated water in top cover is drained to cumulated water well by gravity drainage, in emergency situation, the water would be drained by the self-priming pump installed in gallery.

顶盖内积水正常情况下通过自流排水排至积水井，紧急状态下通过装在廊道内的自吸泵排水。