广西大队十五分队经过数天工作,取样组进行分析总结,逐步改进,使开始淘一般砂要一点钟以上提高到只需五至九分钟,并在取样的其他环节上亦取得了一些经验。 (一)首先要心中有数,了解河流的分布情况,包括主流与支流的分部情况,那些地方应该取样并且可以取样,那些地方不能取样也不应该取样等。这种可以避免沿河乱跑,大大的节省了时间。 The 15th unit of Guangxi Brigade, after several days of work, analyzed and summarized the sampling group and gradually improved it, so that it takes only 5 to 9 minutes for the first sand to begin to appear, and has also gained some experience in other aspects of sampling. (1) First of all, we should know what the distribution of rivers, including the distribution of mainstream and tributaries, where they should be sampled and can be sampled, and where they should not be sampled or should not be sampled. This can avoid running around the river, greatly saving time.