Wears performance of mechanic face seal is analysed. Basis law for design and estimation and amelioration of mechanic seal's invalidation is provided.

作者对机械密封端面的磨损特性进行了分析，以指导和改进机械密封的设计及对密封失效的判断。

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It is pointed that with rock asphalt content increasing, its effectives wears off. When content increases from 20% to 25%, performance of mixture has little change.

研究认为，随着岩沥青掺量的增加，其对混合料路用性能的影响逐渐减弱，当掺量由20%增加到25%时，性能变化很小。

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The Traditional EDM can achieve stable discharging but the electrode wears dramatically, which decreases the EDM milling performance.

液中电火花铣削加工时相对稳定，但电极相对损耗严重，妨碍了电火花加工性能的提高。

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While traction batteries are heavy, and mass is bad for acceleration and agility, the lower center-of-gravity often compensates with higher levels of cornering, especially when a car wears rubber like the Signature Performance edition's sticky 21-inch summer tires.

WSJ: 2012 Tesla Model S Signature Performance Review: I Am Silent, Hear Me Roar | Rumble Seat by Dan Neil