Methods Traditional methods of direct suture were changed and new angle of lips was made by triangle rotationflap.
方法：改变两种传统方法直接缝合口角的方式，而以三角形返折瓣形成新口角；
2
Objective To evaluate the clinical significance of submental island flap and cervicothoracic rotationflap in repairing defect of parotid region.
目的 探讨应用颏下动脉岛状皮瓣和颈胸旋转皮瓣修复腮腺区肿瘤切除术后组织缺损的可行性。
3
Butterfly valve is closed parts (valve flap or disc for disc), around the valve axis of rotation to achieve the open and close a valve, in the pipeline mainly as shut off and throttling effect.