expansion of the arch

英 [ɪkˈspænʃn ɒv ðə ɑːtʃ]

美 [ɪkˈspænʃn əv ðə ɑːrtʃ]

网络牙弓扩张

A theoretical equation of the expansion drawing of the intersecting line for a steel tubular arch bridge is introduced, by which the processing of the intersecting line-the difficult problem of making a steel tubular arch bridge can be solved.
介绍钢管拱桥梁相贯线展开图的理论方程，应用它解决钢管拱桥梁制造的难点&相贯线的加工。
If the second molar is not erupted, application of arch expansion techniques should be done as early as possible in order to help reduce the degree of lip tilting by increasing the arch width.
在第二恒磨牙未萌出之前，要尽早应用扩弓技术，有利于通过增加牙弓宽度减轻切牙唇倾程度。
The expansion of mandibular arch crowding is not only reflected in the post-arch, but also embodied in the former arch, and accompanied by the tilting of the anterior lip when crowding cases were treated with Damon self-ligating system. 4.
Damon自锁托槽技术对下颌牙列拥挤的扩弓作用不仅体现在后牙弓，而且还体现在前牙弓；并伴随有前牙的唇倾趋势。