The turning ring is rotationally arranged in the roller and encloses the roller, and the turning ring is provided with a plurality of accommodating grooves.

转动环可转动地设置于滚筒并围绕滚筒，且转动环具有多个容置槽。

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The clamping balls are arranged in the accommodating grooves respectively, and each clamping ball is protruded out of the external surface of the turning ring.

钳制球分别设置于容置槽内，且每一钳制球凸出于转动环的外表面。

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Since the whole subject of compounding has such a crass ring to it, I will attempt to introduce a little class into this discussion by turning to the art world.

由于复利这个话题牵扯的范围很广，我就试着把这个讨论转向艺术世界，来引入一门小课程。

youdao

The large size of the key (sorry to go on about it), the ergonomic turning head and chunky ring, are all designed to be easier for people with physical impairments to get it out of a bag and in to the lock.

BBC: Disabled toilets: What is a Radar key?