常見例句雙語例句While designing the bottom structure of casing string for highly deviated wells, whether or not to use the floatation collar depends on the running friction and casing buoyant weight.對(duì)于大斜度井設(shè)計(jì)套管柱下部結(jié)構(gòu)時(shí)，根據(jù)計(jì)算套管下人的摩阻和套管浮重決定是否采用漂 浮接箍。westbank0.spaces.live.com 返回 buoyant structure