The key points of facelift depend on the range and plane of dissecting, the direction of flap lifting and the extent of tightening.
面部除皱术的关键在于：确切的解剖分离平面和范围；确切的上提方向和提紧度。
The key component-tightening pulley of the hand-held binding machine is working under the action of the multi-intersection changing forces.
手持式捆扎机中的张紧轮是在多种交变力的综合作用下进行捆扎工作的关键零件。
The key component-tightening pulley of the hand-held binding machine is working under the action of the multi-intersection changing forces.
手持式捆扎机中的张紧轮是在多种交变力的综合作用下进行捆扎工作的关键零件。
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