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延长油矿

延长油矿

延长油矿

延长油矿

1

The Establishment and Improvement of All-round Quality Management System in Yanchang Oilfield Administration Bureau

延长油矿管理局建立健全全面质量管理体系实践

2

Early Exploration and Exploitation of the Yanchang Oilfield

延长油矿的早期勘探与开采简述

3

On the whole establishment of Yan-chang oil deposit in the late Qing Dynasty

清末陕西延长油矿创办始末

4

Current Development of and Reflection on Yanchang Oilfields

延长油矿的发展状况与思考

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