环空

1.
annulus
钻井工程英语词汇快速提高 - 豆丁网 ... 井壁 well wall 环空 annulus 井深 well depth ...
www.docin.com|Based on 53 pages
2.
annular
20080902石油技术说明书EC - 译员进阶-翻译论坛 ... assy 组合 annular 环空 working slot 工作槽 ...
bbs.e5zj.com|Based on 25 pages

Sample Sentence

Definition:
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Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard