The method for recognizing gas zone with PND logging data is introduced, which is to overlap the counting rates of a near detector and a far one to recognize gas zone based on certain scale.
介绍了利用PND测井资料进行气层识别的方法，即利用近探测器计数率和远探测器计数率以一定比例进行重叠的方法识别气层。
Southwest maize zone is one of the largest maize zone of China, Ac counting for about 30% of total area and total output of the nation.
西南玉米区是我国三大玉米主产区之一，分别占全国玉米总面积、总产量的30%左右。
Its only present rival, the euro, has a much smaller circle of influence, counting 25 devotees, beyond the 17 members of the euro zone itself (see chart).
美元唯一现存对手欧元影响圈更小。欧元除了在欧元区的17个成员国外，统计中只有25个国家把欧元作为流通货币。
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