Radial spherical plain bearings have an inner ring with a sphered convex outside diameter and an outer ring with a correspondingly sphered but concave inside surface.
径向球面滑动轴承由一个具有凸球形外表面的内圈和一个具有相应凹球形内表面的外圈组成。
The outer surface of the guide post is in a wavy shape matched with the arc-shaped inner concave head form top to bottom.
导柱外表面自上而下呈与弧形内凸头配合的波浪状。
A shell of a magnetic rod is disclosed, which wraps a permanent magnet rod, and the outer surface of the shell is provided with a plurality of concave grooves.
公开了一种磁力棒的外壳，其裹在永磁体棒外面，所述外壳的外表面设有若干凹槽。
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