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9Yahoo. Schlumberger to cut 11,000 more jobs[EB/OL].(2015-04-16) [2015-08-25].http://finance.yahoo.com/news/schlumberger-cut-more-jobs-expects-204028488.html. 被引量:1
10Halliburton. Halliburton and Baker Hughes creating the leadingoilfield services company[R]. 2014-11-17. 被引量:1