从数百克磨細的样品中,取出一、二十克的化验样,一般是用方格法取样来保証样品的代表性。但手工操作很慢,每个方格也很难取得均匀,取出来的总重量往往不是太多,就是太少,难于掌握。使用方格法取样器,不但操作简单,对样品的代表性及要求数量的准确性都比手取法为高。 From hundreds of grams of ground samples, remove one or twenty grams of the sample, the sample is usually used to ensure that the sample grid representative. However, the manual operation is very slow, each grid is also difficult to achieve uniform, the total weight removed is often not too much, too little, difficult to grasp. Using the checkered sampler, not only is the operation simpler, the accuracy of the representativeness of the sample and the required quantity is higher than that of the hand extraction method.