This paper gives a brief description of various kinds of facilities, reconnaissance and surveying, and design of transit marks of a swinging ground for magnetic compass adjustment.
本文对磁罗经校正场的设备种类、勘察测量和标志设计等作了扼要的阐述。
2
The gyroscopic surveying instrument USES a gyroscope, compass card, plumb Bob, and modified movie camera.