... 油环油气藏：oil-rim reservoir 油痕：oil trace 油罐自动液面计量：automatic tank gage ...
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... 油斑 Oil potted 油迹 Oil trace 荧光级 Order of fluorescence ...
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oil spray trace indicating device 油液航迹显示器
Trace Oil 微量油
trace oil treatment 微量油处理
Oil-gas source trace 油气源追踪
trace inhibited oil 含微量抗氧化添加剂油
trace oil in mine drainage 矿井水微量油
Samples of the oil have also been sent for testing to try and trace its source.
BBC: Oil taking toll on sea birds
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