多次: many times; time and again; ...关: close; shut井: well器: implement; utensil; ware两次关井测试法: double shut-in method关井: close in; sekii; shut in; well off; well shut-in; well shutdown封井器: boblowout preventer多次: many times; time and again; repeatedly; on many occasions 她曾多次访问中国。 she's visited china many times. 他在部队里多次立功。 he repeatedly distinguished himself in the pla. 我在公共汽车上见过他多次。 i met him many a time in the bus.; 多次曝光全息图 multiple-exposure hologram; 多次标准添加法 multiple standard addition method; 多次编译程序 multi-pass compiler; 多次重复访问 multiple repeated reference; 多次抽样 multiple sampling; multiple-scale; 多次定位 multiple bearing; 多次往返有效入境签证 multiple entry-exit visa; 多次违约 repeated breaches泥浆压井器: mud lubricator次关键工作: near-critical activity次关键活动: near critical activity; near-critical activity; sub-critical activity依次关机: ordinal index value因次关系: dimensional scaling初关井: initial shut-in关井期: closed-in time软关井: soft shut-in硬关井: hard shut-in终关井: final shut-in震击钻井器具: hammer drill层次关系结构: hierarchical relation structure齐关系, 齐次关系: homogeneous relation防喷器, 防喷装置, 封井器: blowout preventer闪烁计数测井器: scintilogger低关井压力: low shut pressure地面关井: surface shut-in