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Mochu Ir200x220x50 Ir 200x220x50 Needle Roller Bearing Inner Ring , Precision Ground , Metric, 200mm Id, 220mm Od, 50mm Width - Shafts - AliExpress
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Amazon.com : BonyTek Flagpole Ring Set with Bearings, Aluminum Alloy Flag Pole Rings, 360°Rotating Flag Mounting Ring, Spinning Flag Pole Clips Kit with Carabiner for 0.75-1.0 Inch Diameter Flagpole|Silver-2 Pack : Patio,
![What's the Structure of the Bearing? The role of the structure and parts in reducing friction / Bearing Trivia / Koyo Bearings(JTEKT) What's the Structure of the Bearing? The role of the structure and parts in reducing friction / Bearing Trivia / Koyo Bearings(JTEKT)](https://koyo.jtekt.co.jp/en/uploads/column01_03_02.png)