Through calculating friction factor and operating point of pump or fun of two examples on fluid mechanics, methods using solver and curve-fitting in EXCEL were introduced.

通过对流体力学中沿程阻力系数和泵与风机工作点等问题的求解，介绍了EXCEL单变量求解器和曲线拟合的方法。

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Because of the line contact or even point contact between zigzag slot and pin, its friction is different and needs to be studied.

由于惯性筒上的曲折槽与销间的为线接触甚至点接触，因此针对此处较为特殊的摩擦系数进行研究。

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Investigation results show that nanoparticles are excellent lube additive in point of anti-friction and anti-wear property.

研究表明，纳米粒子添加剂具有优良的抗磨减摩性能。

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Without digital ID, we are stuck with the greatest friction point in Web commerce: that redundant typing in of passwords and filling out of home address fields for the umpteenth time.

FORBES: Where Everybody Knows Your Name

He is at the friction-point of two cultures .

UNESCO: The Uses of Richard Hoggart

The spending level between current Kodak customers and current Shutterfly customers is meaningful, which leads to friction in up-selling Kodak customers to higher price-point goods.

FORBES: Shutterfly's Kodak Gallery Deal: Game-Changer Or Not?