edm gps
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Combined with survey experience, the author probed into the methods of setting up ground control net with GPS and EDM lead for small hydropower projects based on the introduction of practice examples.
结合测量经验，探讨了用GPS与EDM导线建立小水电工程地面控制网的方法，并以实例加以介绍。
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