The gyro vertical utilizes a gyroscope as an integrating device to obtain the average position of a pendulous gravity reference .
2
介绍了用自平衡比较仪通过自校、加法、比较和乘法等校准线路实现直流大电流量值的绝对溯源。
It can be obtained the trace to the source of large direct current with self-balancing DC comparator through self-calibration circuit, addition circuit, compare circuit and multiplication circuit etc.
3
提出一种新型激光准直仪理论根据，证明在一定范围内激光束平移或角位移并不影响基准线的位置。
A new theoretical basis of novel laser alignment instrument is put forward. It proves that the position of the basic line will not be influenced when the laser beam has translation and angular motion.
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