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介绍了在施工放线测量时 ,由于直线不通视或架设仪器困难等条件下的测量方法 ,且用实例加以说明 ,并指出该方法在应用中要注意的几个问题。
This paper introduces the measurement methods under the conditions of straight line invisible, difficult installation and so on, and gives an example to illustrate it. Some problems to be noticed in this method are pointed out.