The pistons are graphite-coated to reduce friction.

活塞表面涂有石墨以减少摩擦。

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Bearing metal tin can up closed and reduce friction role.

轴承金属镀锡可起密合和减磨作用。

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Surface texture can help reduce friction forces if the texture is not destroyed.

表面纹理在不发生破坏的前提下可以有效降低摩擦力；

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The purpose, he says is they need to reduce friction from adding photos to Twitter.

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But if the building is well pivoted to reduce friction, that requires surprisingly little power.

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The goal is to reduce friction with host nations, the kind that results from accidents and other problems relating to local sensitivities.

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