fall fall back on求助于
fall-back pay值班工资;翻译
fall l back on依靠;求助于
fall-back procedure后退过程
fall-back mode低效方式运行
fall-back state[计] 低效运行状态
Fall-back Methood合理估价方法
Fall-back method回顾”方法
fall-back[计] 低效运行;待援电算
By launching the ball into the injected gas, it can form the steady slug flow and prevent liquid to fall back because of the solid interface between gas and liquid phases. Thus, it can improve the instability of gas lift, and reduce the slippage between gas and liquid phases thereby, increase lifting efficiency.
球塞气举是一种新型高效的气举采油方式，采用U型双管柱(一注一采)，在地面注入气流中投入气举球，使之在举升管柱气体和液体之间形成一连串的固体界面以实现稳定理想的段塞流状态，有效地防止液体回落，从而提高气举的稳定性，减小滑脱损失，提高举升效率。
参考来源 - 气液滑脱损失分析与球塞气举瞬态模拟研究V（动词） to recede or retreat 后退; 撤退
N（名词） a retreat 撤退