Methods Traditional methods of direct suture were changed and new angle of lips was made by triangle rotation flap.
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；
Objective To evaluate the clinical significance of submental island flap and cervicothoracic rotation flap 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。
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.
蝶阀是指关闭件(阀瓣或蝶板)为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀，在管道上主要起切断和节流作用。
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.
蝶阀是指关闭件(阀瓣或蝶板)为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀，在管道上主要起切断和节流作用。
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