A convex-shaped projection (26) extends from the lower plate and engages an articular surface defined by a concave recess (28) formed in the upper plate.
一凸形突起物（26）延伸自下板，并接合一关节表面，该关节表面由在上板中形成的一凹入凹处（28）所限定。
Thecoherent scattering of Gaussian beam by arbitrarily shaped convex dielectric object with rough surface is investigated.
研究了任意形状凸粗糙物体对高斯光束的相干散射特性。
The re-bar end used for electroslag welding should be straight, flat and clean free of U-shaped, bruising, concave and convex, bending or distorted deformations.
电渣压力焊焊接使用的钢筋端头应平直、干净，不得有马蹄形、压扁、凸凹不平、弯曲扭曲等严重变形。
The main knife-edge area is a convex strip-shaped cutting belt, and is used to cut into sheets and threads;
主刀口区是呈凸弧狭条形切割带，用于切片切丝；
The main knife-edge area is a convex strip-shaped cutting belt, and is used to cut into sheets and threads;
主刀口区是呈凸弧狭条形切割带，用于切片切丝；
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