RESEARCH ON CUTTINGS MIGRATION IN THE FLOW CORE ZONE AND VELOCITY GRADIENT ZONE OF ANNULAR SPACE IN DRILLING INCLINED HOLE AND HORIZONTAL HOLE是什么意思_RESEARCH ON CUTTINGS MIGRATION IN THE FLOW CORE ZONE AND VELOCITY GRADIENT ZONE OF ANNULAR SPACE IN DRILLING INCLINED HOLE AND HORIZONTAL HOLE在线翻译_英语_读音_用法_例句