在臂前外侧，腋前纹头下3寸，肱二头肌桡侧缘处。

注：肱二头肌外侧沟平腋前纹头处至尺泽(LU5)连线的上1/3与下 2/3的交界处。

On the anterolateral aspect of the arm, just lateral to the border of the biceps brachii muscle, 3 B-cun inferior to the anterior axillary fold.

Note: Longitudinally, LU3 is located at the same level as the junction of the upper one third and lower two thirds of the line connecting the level with the anterior axillary fold to LU5.

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