In delivery layers, the efforts driving hydrocarbon are mainly buoyancy and capillary force, and caprock plays an role of capillary resistance.
在运载层中推动油气运动的作用力主要是浮力和毛细管力，而盖层则起着毛细管阻力作用。
The surface tension, arc blow force and electromagnetic force work positive to improve the penetration, and the buoyancy can increase the width in the middle of weld pool.
表面张力、电弧吹力和电磁搅拌力均有利于获得较大的熔深，浮力有利于增加焊缝中间部位的宽度。
This paper presents the calculation method of external loadings for offshore drilling platforms induced by gravity, buoyancy, wind, wave, current and seismic force, and relative computer programs.
本文介绍了海上钻井平台由重力、浮力、风、波浪、潮流及地震力引起的外载荷计算方法，并编制了相应的计算程序。
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