- 1. Directing of horizontal component magnetic variometer and directional checkout are important operation to guarantee quality of record.
- 水平分量磁变仪定向与定向检查是保证记录质量的一项重要工作。
来自互联网
- 2. Directing of horizontal component magnetic variometer and directional checkout are important operation to guarantee quality of record.
- 水平分量磁变仪定向与定向检查是保证记录质量的一项重要工作。
来自互联网
