The basic design self-aligning ball bearing is available with a cylindrical bore or, in certain size ranges, with a tapered bore (taper 1:12).
自调心球轴承的基本设计带有一圆柱孔，或者在某些尺寸范围内带一圆锥孔（圆锥1：12）。
Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.
键槽轮毂的锥孔应至少有70%的着色（表面接触）转移到锥度计上？
The taper slip is a highly polished tapered stem designed to settle within the cement mantle and re-engage the taper.
锥度减小设计为高抛光的锥形柄，允许假体柄在骨水泥套中下沉并再度获得稳定性。
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