back-off joint 倒扣短节
back-off operation 倒扣作业
back-off procedure 倒开步骤
back-off 倒开
back-out 旋松;退火;取消;拧出
back-packer 支撑式封隔器
back-pressure regulator 回压调节器
back-pressure valve 回压阀
back-purge system 反冲洗系统
back-ridge 洋脊背侧
back-roll 反绕
back-scattered ground roll 反向散射地滚波
back-scattered noise 反向散射噪声
back-setting effect 逆流效应
back-side-crank pumping unit 单拐多连杆抽油装备
back-sizing 单面上浆
back-sliding nappe 后滑推覆体
back-slope 后坡
back-spacing 返回
back-step welding 逐步退焊
back-to-back counter 加倍计数器
back-to-back credit export first 输出方先开的对开 信用证
back-to-back credit import first 输入方先开的对开信用证
back-to-back 对头拼接
back-up attachment 背钳附件
back-up control manifold 辅助控制管汇
back-up corner 后备位置
back-up curve 辅助曲线
back-up galvanometer 辅助检流计
back-up post 支柱
back-up safety 备用安全装置
back-up surveillance 辅助监督
back-up tong 背钳
back-up wrench 背钳
back-ups 背钳
backacter 反铲挖土机
backarc 后弧
backbarrier complex 障壁后复合体
backbarrier deposit 障壁后沉积
backbarrier facies 障壁后相
backbarrier 障壁后
backbeach 滨后滩
backboard 底板
backbone chain 主链
backbone pipeline 干线
