The rolling friction is substituted for sliding friction results in a considerable reduction in friction.

如果滚动摩擦代替了滑动摩擦，摩擦力将大大减少。

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The fine grain and narrow HAZ were found in friction stir weld and the dynamic recrystallization produces fine grain.

焊核区由于动态再结晶具有细小的等轴晶粒，旁边存在一个特殊的组织形貌——热机影响区域。

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This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift.

该摩擦力的非线性改变使速度产生变化，导致人们在搭乘液压电梯时产生不舒适感。

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But Ares will use new methods in metal-working science such as friction stir welding.

VOA: special.2009.12.30

And we have not had the kinds of friction that's been seen in the past.

VOA: standard.2009.12.12

Of course,the biggest difference between the two bills, and one likely to cause the most friction in House-Senate negotiations, involves the so-called "public option" or competing insurance the government would offer.

VOA: standard.2009.12.25

"We're finding that when you rub a natural biological surface that has an orientation - that has a grain, if you will - and you run that grain perpendicularly to the long axis of the ridges, we find a dramatic increase in friction, " Dr Dominy told BBC News.

BBC: Artificial finger tests evolutionary origin of prints

"Whereas personality similarity is likely to facilitate this process, personality differences may result in more friction and conflict in daily life, " she said.

BBC: NEWS | Health | Similarity 'makes happy marriage'

But until the bombings, at least there had been the prospect of a reduction in the friction between the central government and the Basque provincial administration.

ECONOMIST: Slaughter in the rush hour | The