| 1. | The valve is capable of zero leakage , low torque operation as well as long life
气密性好，密封性能可靠，操作轻便，寿命提高。 |
| 2. | Fluid friction , less wear of belt , service life being as fitted with safe protection device
流体摩擦，胶带磨损小，寿命提高一倍。 |
| 3. | A drop in deaths from heart disease and stroke helped boost the u . s . life expectancy to almost 78 years in 2005
2005年死于心脏疾病和中风人数的下降使美国人预期寿命提高了78岁。 |
| 4. | The test conditions and production processing of a new type composition brake shoe are introduced , and the working life is raised a times than iron brake shoe , showed by underground industry test
介绍了新型合成闸瓦的试验条件及生产工艺过程；通过井下工业性试验，合成闸瓦比铸铁闸瓦使用寿命提高一倍。 |
| 5. | Cancer ' s burden is on the rise in developing countries as deaths from infectious diseases and child mortality fall and more people live longer , said american cancer society epidemiologist ahmedin jemal
该协会的流行病学家贾梅尔表示，在发展中国家，因为传染病与儿童死亡率逐年下滑，加上平均寿命提高，使癌症死亡病例渐渐增加。 |
| 6. | When used for resin bond grinding wheels , coating can decrease heat damage because its thermal conductivity is between diamond and resin , and can increase the tool life by 50 % ~ 100 %
特别是在树脂结合剂磨具中，镀层的热导率介于金刚石和树脂之间，可以有效地减缓磨削热脉冲对树脂造成的热损伤，从而显著延长其耐用度，使树脂磨具的使用寿命提高50 % ~ 100 % 。 |
| 7. | Compared with the traditional cantilever structure , the bearing life of two - terminal bracing structure is improved by 17 . 51 times , while the contact stress of gear tooth is reduced by 45 . 7 % , and the bending stress of gear tooth is reduced by 62 . 8 %
与传统主动齿轮悬臂结构相比两端支撑结构的轴承寿命提高了17 . 51倍、轮齿接触应力降低45 . 7 % 、轮齿齿根弯曲应力减小62 . 8 % 。 |
| 8. | The s - n curve , the mathematical relationship of bend fatigue strength or life to strengthening loads and strengthening cycles , the maximum increments of fatigue strength and life were obtained by experimental digital processing
通过对试验数据的处理，得到了两种结构弯曲疲劳强度的s - n曲线、弯曲疲劳强度和疲劳寿命与强化载荷、强化次数之间的数学关系，以及经过低载强化后弯曲疲劳强度和疲劳寿命提高的最大幅度。 |
| 9. | Abstract : the factors to influence fatigue life of chain plate areconcluded by experimental methods . the factors to prolong life of chain plate are analyzed by theoretical methods . the maximum value of crushing hole in 16a roller chain plate is calculated by finite element method
文摘:用试验方法确定了挤孔对链板疲劳寿命的影响，从理论上分析了在最佳挤孔量下，链板疲劳寿命提高的因素，用有限元法计算了16a链板的最佳挤孔量，并与试验结果进行了比较。 |
| 10. | Soft pu rollers were used for printing and glazing industry . hard pu rollers were used for iron and steel industry . other polyurethane elastomer such as pu slice , pu bar , pu piece were widely used in all kinds of machine for reduce attrition , acid - resistant , water resistance , insulation with higher toughness , tear strength and low hardness
4 .耐湿性能好，可在水为介质的条件下工作，且在水油等介质的情况下，鑫发聚氨酯与物料的摩擦系数降低，更利于透筛，提高筛分效率，并可避免潮湿微粒的粘附，同时因磨擦系数降低，磨损减少，使用寿命提高。 |
