When selecting brake shoe, the dynamic friction coefficient must fulfill the request of both brake capability and stability.

选择鼓式制动器摩擦片时，动摩擦系数的选择既要满足制动性能，同时也要满足稳定性。

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The invention increases the contact area between the football and the shoe surface, increases the friction and has an adaptive and flexible wearing.

本发明提高了球和鞋表的接触面积，增加了摩擦力，穿着具有较好的适应性和弹性。

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The composite brake shoe of cast iron is developed to improve the running speed on existing line. The ceramic particles are used in the brake shoe to improve the friction coefficient.

为提高既有线的运行速度，开发了铸铁合成闸瓦，该闸瓦利用陶瓷粒子来提高摩擦系数。

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During our steep cliffside descent from Montespluga, Italy, a block of wood was slipped underneath the shoe to increase friction even further.

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The two women share the same shoe size, but this only adds to the friction: Rose has a collection that Imelda Marcos would envy, and Maggie likes helping herself.

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Over the long term the SARS outbreak will add friction to the cost of doing business in Asia, much as impromptu shoe checks, cargo inspections and travel jitters followed Sept. 11 in the U.S. Hotel business in Asia fell 25% from February to March.

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