Is the dog slab sided (lack of rib spring) or barrel ribbed (too wide)?

狗肋部是平板的(肋骨弯曲不足)还是桶状肋(太宽)？

youdao

These bearings have no central rib on the inner ring and are therefore able to use longer barrel rollers.

这些轴承已没有中央肋骨的内圈，因此能够使用较长每桶辊。

youdao

These bearings do not have a central rib on the inner ring so longer barrel rollers can be fitted; improved kinematics, optimised surfaces and even higher performance materials are possible.

这些轴承没有内圈上，使辊筒长可安装中央肋骨，改进运动学，优化的表面，甚至更高性能的材料是可能的。

youdao