The device is called motor copper rings.

这种设备叫电机铜环。

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Motor copper rings are a kind of lifting accessories.

电机铜环是起重配件的一种。

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The swinging rotating joint consists of spherical body, thread joint sleeve, locking screw nut, large copper washer and two spherical rings.

本发明摆动旋转接头由球型接头体，螺纹接头套，锁紧螺帽，大铜垫和两个球面转环构成。

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This is a piece of copper foil 20cm square that has 696 rings, a portion of which is reproduced above.

ECONOMIST: The search for alien life

Fourth, sell diamond rings to college students and fifth, send computer data over copper electric wires.

FORBES: Barnacles, Diamonds and Cows: 5 Startup Failures--My 5 Lessons Learned