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对树木直径的测定是林业生产、科研工作中经常进行的一项工作。用来测定树木直径的工具种类虽然很多,但广泛使用的却只有轮尺,因轮尺使用简单,测定结果精度能满足要求直径卷尺也是测径工具之一,它不仅使用简单,且携带方便。这一优点对林业工作野外作业多,流动性大的情况下是较适宜的。直径卷尺的使用未推广,主要的原因是,认为使用直径卷尺会使测定结果产生偏大的误差影响了调查精度。那么使用直径卷尺究竟会产生多大的误差?按林业工作对测定精度的要求能否达到使用?我们对这一问题进行了试验,现将试验结果整理如下。
The determination of the diameter of trees is a frequent work in forestry production and scientific research. There are many types of tools used to determine the diameter of trees, but widely used only calipers. Because of the simple use of calipers and the accuracy of measurement results, the diameter tape measure is also one of the diameter measuring tools. It is not only simple to use and easy to carry. This advantage is more suitable for forestry field work and more liquidity. The main reason why the use of diameter tapes is not promoted is that the use of a diameter tape measure can cause errors in the measurement results that affect the accuracy of the survey. Then use the diameter tape how much error will produce? According to the forestry work on the accuracy of the requirements can be achieved? We have tested this issue, the test results are summarized below.