tangent galvanometer meaning in Chinese

正切电流计
正切检疗
正切检流计

The method that measuring horzontal component of the earth magnetic field with digital quantometer is introdnces , the computational formule are given , systematic error are discussed , the advantages of the this method with tangent galvanometer measuring horizontal component of the earth magnetic field are simply expounded
摘要介绍了用数字冲击电流计测量地磁场水平分量的方法，给出了计算公式，对系统误差进行了讨论，简述了该方法与用正切电流计法测量地磁场水平分量的优点。