Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.This paper presents the PDC bits with the satisfactory testing result in the multi - interbedded formation.介绍了一种复合式PDC钻头,该钻头在多夹层地层钻井施工中取得了较好的试验效果.A shale for...
At this point , Bardeen , cooper and Schrieffer ( BCS ) produced their epochmaking pairing theory of superconductivity.当时巴丁、库珀和施瑞弗 ( BCS ) 提出了他们的划时代的超导电性配对理论.John Bardeen was also co-developer of the theory of supercondu...
The abdominal examination should rule out diastasis recti, masses , ascites and organomegaly.腹部的体格检查应该分辨出腹直肌, 团块, 腹水及器官肥大.Objective To appraise the advantages and disadvantages in the treatment of tibiofibular syndesmosi...