The periodontal disease can not only destroy the attachment apparatus of the tooth, but also affect many systemic disorders.
牙周病不仅破坏局部牙齿支持组织，亦可影响许多全身性疾病。
An attachment apparatus is integrally connected with the body, with a detachable wing connected with the attachment apparatus.
一连接装置与本体一体相连，可拆翼与该连接装置相连接。
The paper respectively studies the principles and features for profiling attachment and slider crank mechanism to be used as clamping apparatus to fabricate oval hand hole cover.
分别对凸轮靠模和曲柄滑块机构作为工装加工椭圆手孔盖的原理及特点进行了探讨。
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