The results show that: the whole bit wear process can be divided into three phases;

发现钻头的整个磨损过程可分为3个阶段；

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The work hardening is present on the surface of audio heads during the wear process.

磁头在磨损过程中表层有冷加工硬化现象。

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Therefore, the analysis of wear debris is a useful means for monitoring wear process and studying wear mechanism.

并表明磨屑的分析研究对监测磨损过程及研究磨损机理是一个十分重要的手段。

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And as you grind to gear up, you inevitably wear down your existing weapons and spells in the process.

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Tom Shoes for example sells shoes and makes a profit, but in the process he helps impoverished children who have nothing to wear.

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This is a messy process that takes several days and requires workers to wear respirator suits to protect themselves from hazardous materials as they sand, prime, mask and repaint the aircraft.

ECONOMIST: It’s a wrap | The