secondary operation
短语词组
- secondary resizing operation 二次加工
- secondary tillage operation s 整地作业
- secondary brake operation 辅助制动器工作
- secondary sizing operation 二次定型加工
- secondary recovery operation 二次采油作业
- stable secondary cohomology operation [数]稳定二阶上同调运算
- secondary cohomology operation 二阶上同调运算
- secondary direction of operation 次要作战方向 返回 secondary operation