abbr.north-north-east 北东北;
例句:
The principal compressional stress axis obtaind through focal mechanism solutions show NNE and NW orientations.
由震源机制解求出的主压应力轴为北北东向和北西向.
The main controlling structures are the NNE, and NE-trending faults.
区内主要控矿构造为北北东 、 北东向构造.
For more information about NNE, please visit our website.
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