通过精密观测(误差在1%以下)，能获得地震的前兆信息。
Through precise observations (the error of which should be smaller than 1%), it is possible for us to obtain precursory information of the earthquakes.
精度分析和实际应用表明；观测成果是可靠的，采用几种精密测量方法联合进行，可以满足观测标志的高精度要求。
The precision analysis and practical application indicate that all the results are reliable and united several precision surveying methods can satisfy high accuracy.
用钢尺做精密量距是土坝纵向水平位移观测的最优观测方法。
Using steel tapes to measure the distance is the best method for the observation of the horizontal displacement of earth DAMS.
应用推荐