本文提出平面角的水平投影与其空间角相等时新的作图方法。
This paper provides a new construction method used when the horizontal projection of the plane Angle is equal to its space Angle.
同时，这些刀具的平面角必须始终与螺纹形状的平面角保持一致。
Also, the plane angles of these tools must always be identical to those of the thread forms.
本文以命题形式讨论无棱二面角的平面角大小的几种解法并加以证明和举例。
In the form of propositions, this paper discusses several solution methods of the size of dihedral angles and proof and example are also offered.
文本用纵向塞曼双频稳频激光器作光源，提出了一种光学超外差法小平面角的精密测量方法。
This paper discussed an opto-heterodyne technique for small-plane-angle measurement with a frequency-stabilized longitudinal Zeeman laser as the light source.
上颌骨向前发育，下颌骨后退，下颌平面角无明显增大，上下颌骨间不调改善，鼻唇角减小，面型明显改善。
Maxilla grew forward, mandible moved back. The mandibular plane Angle had no significant change. The discrepancy between maxilla and mandible were improved.
上颌骨向前发育，下颌骨后退，下颌平面角无明显增大，上下颌骨间不调改善，鼻唇角减小，面型明显改善。
Maxilla grew forward, mandible moved back. The mandibular plane Angle had no significant change. The discrepancy between maxilla and mandible were improved.
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