磨擦

It was found the wear volumes of cera -mits and east irons were reduced in water Lubrication. Wear volumes of grey easts were greater than that of ductile iron when matched with Al2O3, and the wear volumes of steel were the greatest. The wear volumes of Al2O3 against east iron was greatly smaller in air than against steel.

结果表明：蒸馏水润滑下Al2O3及铸铁的磨损体积均小于在干磨擦条件下；在同一润滑条件下，钢的磨损体积大于铸铁磨损体积，球墨铸铁磨损体积最小；陶瓷Al2O3磨损体积在干摩擦时与铸铁配副时比与钢配副时要小得多。

The movements maximally affecting subcutaneous cellular tissue to lose fat are rubbing over and squeezing out, whereas effleurage, pettrisage and vibration are the auxiliary ones.

其中最能影响皮下脂肪细胞组织达到减脂的动作是磨擦和挤压，而按抚、揉捏和震动是辅助方法。

Whereas the main movements for muscle gain that maximally affect the muscle tissue are pettrisage, the auxiliary ones are effleurage, rubbing over, percussion and vibration.

最能影响肌肉组织达到增加肌肉的动作是揉捏，而按抚、磨擦、拍打和震动是辅助方法。

The plastic go down the hopper smoothly and is gripped by the thread of the screw. It is forced to go toward the direction of the gear end along with the rotation of the screw. A mechanical transferring process is formed. During the running of the plastic from the feed port to gear end, a high pressure is formed in the process of plastic curing due to the gradual decreasing of the thread depth and the resistance of filter gauze, splitter plate and gear end. The high pressure helps to press the raw material and improve its heat conductivity performance and the quick melting of the plastic, at the same time, the gradual increasing pressure can help the gas which is among material particles exhausted from the air holes.

在压力升高的同时，塑料一方面被外部加热，另一方面塑料本身在压缩、剪切、搅拌的运动过程中，由于内磨擦力也产生了大量的热，在外力和内力的联合作用下，塑料温度逐渐增高，其物理状态也经历了玻璃态--高弹态--粘流态的变化，一般地说来，在加料段中主要是玻璃态，在螺杆螺纹逐渐减少的中间部分压缩段中，物料主要处于高弹状态，同时也逐渐的熔融，而物料到压缩段后部和化段作用处于粘流态了，这时我们称塑料已完全塑化了，由螺杆推力作用将塑化的塑料定压定量的从机头中挤出。

Extruded through the extruder screw and feed the mechanical friction, so that feed raw materials have been strong squeezing, mixing, shearing, and generate high temperature and high pressure.

膨化是通过膨化机的螺旋与饲料的机械磨擦，使饲料原料被强烈的挤压、搅拌、剪切，并产生高温、高压。

Ideally suited for sewing two needle fancy and functional seams,specially on closed shoeuppers.Owing to the combination of wheel feed nat driven roller presser,the machine stitches over cross seams with ease.Accurate and uniform setting of stitch es and i

适合于鞋面的车缝及饰缝，特殊综合送，车薄料不土起皱，车厚料缝迹美观，釜座位于针的右方，方便于童鞋及各式鞋类的车蓬，缝目设定精确一致，大小可自由调整，设有操作简便的安全离合器，可减小梭头的损坏，采用球型及针状轴承，配合连杆式天平，磨擦小免保养。

Small noises and high performance air-tightness: the door is adopting the two-ties conductor rails and PVC close fitting strip, so it avoids of intermetallic attrition; at the same time, it is assured of close-fitting strip of the door.

噪音小、密闭性能高：门框由于采用双重导轨（钢导轨及 PVC 导轨）并加 PVC 密封板，这样就避免了金属间的磨擦而造成的噪音及对门漆的破坏、同时又保证了门的整体密封性。

She did not look up when he entered, although the scuff of his boots on the flagstones announced him clearly; he stood for a moment in the doorway, arms folded across his breast, but still she did not turn.

他进来的时候，她并没有抬头，虽然他的靴子在石板上磨擦的声音清楚地表明他的到来；他两臂交叠在胸前，在门口站了一会儿，而她始终没有回头。

Batting, increased flexibility and friction, the ball can have a certain rotation, resulting in a reduction of the defence of spin ball game.

击球时增加了弹性和磨擦力，可以使球产生一定的旋转，因而出现了削下旋球的防守型打法。

What's the friction resistance coeffiency of the belt conveyors?

皮带运输机的抗磨擦系数是多少？

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失