The crestal line is the major direction of hydrocarbon migration, the exploration Wells near the crestal line are indications of oil and gas.
该构造的脊线是油气运移的主要指向，在脊线附近的探井具有良好的油气显示。
2
Additional the use of a platform switched implant system with a sealed implant-abutment connection is essential to keep the crestal buccal bone.
另外，通过密封的基牙种植连接使基台转化为种植系统是保持颅颌骨骨性完整的必要过程。
3
The results show that oil recovery can be enhanced effectively by gravity drive of crestal nitrogen injection for increasing oil production and decreasing water cut.