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在相对高差大于1000米,绝对高差在300米以下的中山地区,如何有效的利用航片进行土壤普查,以加快进度和提高质量,这是我们面临的迫切任务.全
In Zhongshan, where the relative elevation is more than 1000 meters and the absolute elevation is below 300 meters, how to effectively use aerial photos for soil census in order to speed up the progress and improve the quality is an urgent task for us.