导线测量是一项精密而细致的工作，直接影响到路线的定线和高程系统的控制。
The orientation measurement is a precise and detailed job, and it affects directly the route alignment and the control of elevation system.
公路的定线测量工作传统上以外业为主。也就是说，定线测量工作的大部分时间和精力都花在现场的测量和观察上。
Traditionally, highway location practice has been field oriented, that is, the bulk of the location party's time and effort went to measurement and observation "on the ground".
公路的定线测量工作传统上以外业为主。也就是说，定线测量工作的大部分时间和精力都花在现场的测量和观察上。
Traditionally, highway location practice has been field oriented, that is, the bulk of the location party's time and effort went to measurement and observation "on the ground".
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