... ball bearing felt packing 球轴承油毡 ball bearing fit 球轴承配合 ball bearing grease 滚珠轴承用牛油 ...
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ball-bearing fit 滚珠轴承配合
ball bearing fit detail 滚珠轴承配合
ball bearing lead screw fit 滚珠丝杠副
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The second version also has a smaller ball bearing mount for the eyes, which means the later eyes will not fit the earlier lenses, though the older eyes will fit the later lenses.
第二版安装眼镜的处的小球较小，这意味着新版的眼镜不能用在旧版的镜上，虽然旧眼睛可以装到新镜头上。
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