The periodontal disease can not only destroy the attachmentapparatus 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。
2
An attachmentapparatus is integrally connected with the body, with a detachable wing connected with the attachmentapparatus.
一连接装置与本体一体相连，可拆翼与该连接装置相连接。
3
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.