The life of the artificial hip joint is closely related to joint surface wear.

人工髋关节的寿命和关节面的磨损密切相关。

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Put the protect film on the image, increase the images intensity and surface wear resistance.

将护膜覆在图片上，使图片的强度及表面的耐磨性提高。

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Movement between the ring sealing surface coated with grease to prevent the movement ring sealing surface wear in the pump drive.

动静环的密封面之间涂以润滑脂，防止动静环密封面在水泵开车前磨损。

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But an exceptionally dry surface started to show signs of wear after just a couple of overs, courtesy of Peter Siddle's bustling footmarks, and by lunch repairs usually made much later in a Test match were being carried out by the ground staff.

BBC: England struggle in deciding Test

While most brass pens are heavily lacquered to preserve their lustre, the Hatch is finished with just a thin coat intended to wear away quickly, leaving the hygienic surface exposed.

WSJ: To Contagions, This Pen Is Deadlier Than the Sword