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[A] (WITTRISCH CHRISTIAN [FR]) [A] 1,11* column 4, line 46 - column 5, line 18; figure - *; | Type: | Patent literature | Publication No.: | US5947213
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[A] (BIGELOW HERBERT L); | Type: | Patent literature | Publication No.: | US4729429
[A] (WITTRISCH CHRISTIAN [FR]); | Type: | Patent literature | Publication No.: | US4940094
[X] (LESSI JACQUES [FR], et al); | Type: | Patent literature | Publication No.: | WO9209784
[A] (PHOENIX PETROLEUM SERVICES [GB]); | Type: | Patent literature | Publication No.: | US5957206
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