尺骨掌侧面 facies volaris ulnae
桡骨掌侧面 facies volaris radii
·2,447,543篇论文数据，部分数据来源于NoteExpress
结论：前臂完全旋后时，桡骨向远侧、背侧移位，尺骨头靠在尺骨切迹的掌侧面。
Conclusion: While the forearm in complete supination, the radius shifts to the dorsal and distal side, and the capitulum ulnae is at the volar side of the notch ulnae.
youdao
他转过身来，我对着他的头部侧面就是一掌。
He turned and I slapped him right upside the head.
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