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Gearhart

Gearhart

2、测井领域　1985年，斯伦贝谢、阿特拉斯、吉尔哈特（Gearhart）三家占领了世界油气田测井市场的85％。现在吉尔哈特已 …

That guiding process has proven difficult to do efficiently, especially for creating insulin-producing cells , Gearhart noted.