It has peculiar advantages to use lightweight Hollow Glass Spheres (HGS) to reduce the density of mud in riser in Hollow Glass Spheres Dual Gradient Drilling.是什么意思_It has peculiar advantages to use lightweight Hollow Glass Spheres (HGS) to reduce the density of mud in riser in Hollow Glass Spheres Dual Gradient Drilling.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句