It is very important to resolve the problems of anti-friction ring failure due to partial worn at Northern Erdos Work Areas by reasonable selection of high-abrasive materials and welding techniques.

选择合理的耐磨材料与敷焊工艺对解决鄂北工区钻杆偏磨耐磨环失效问题非常重要。

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Another major difference is that Palm's dock uses magnets to line up and secure the handset, and LG's accessory relies solely on the friction between a rubber ring and the glass back of Google's flagship phone.

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