使用寿命

According to the airport cement concrete pavement requirements,the service life index of the pavement is set up.

根据机场水泥混凝土道面的使用要求，确定了道面的使用寿命指标。

We should prevent products from rip and laceration in the course of transportation and install.

产品在使用过程中要定期紧固螺栓，检测垂直度或进行全面检测，以提高产品的可靠性和使用寿命。

Now, after the paper-making technology cannot keep grain problem, we must be in the business card printing and membership card production, membership card after processing and packaging of ways to pay attention to the direction of the grain of the paper, so that the business card printing and membership card and life quality cannot be guaranteed.

在现在经过造纸工艺技术不能有效避免丝绺问题的情况下，我们必须在制卡和会员卡制作、会员卡制作后加工以及包装使用过程中采取各种方法来注意纸张的丝绺方向，使制卡和会员卡制作质量和使用寿命得到保证。

Due to its own characteristics and special service conditions, impact toughness is one of the main factors affecting the service life of H13 mandrel steel.

由于H13芯棒本身的特性及其特殊使用条件，冲击韧性是影响其使用寿命的主要因素。

It has been revealed that gear's modification can improve its performance patently.

有大量研究表明，齿轮修形能有效改善齿轮使用性能，提高齿轮使用寿命。

Decreasing the parts' surface roughness, as it is shown after a long time practice that can realize the reliability and stabilization of the match; can reduce faction coefficient, wear, stress concentration, vibration, noises, and power consumption; can improve the operative precision and perceptivity; can increase the support area and contact intensity; and also can improve wear degree etc.

长期的生产实践表明，降低零件的表面粗糙度，对保证配合的可靠性和稳定性；对减少摩擦系数，降低动力消耗；对提高机械和仪器的工作精度和灵敏度；对增大支撑面积，减少磨损，提高接触刚度；对减少应力集中，增加耐疲劳强度，减少振动和噪声等均起着重要的作用：即表面粗糙度直接影响着机械和仪器的使用性能和使用寿命。

In using course, our products reflect stability and perfectibility in connecting and disconnecting, long using duration, the whole quality of products is leading positions on average level of domestic market.

凭借先进的工艺技术及装备，选择优良的原材料及严密的质量控制，使生产的离合器面片具有优异的耐磨损性能和物理机械性能，在使用过程中接合平稳、分离彻底、使用寿命长，整体质量水平目前在国内居先进水平。

The critical time of failure was determined according to the discontinuity point of activation energy and dynamic mechanical properties.

但由于分子链极性基团的存在，PA66易发生老化，从而导致材料的性能降低，使其使用安全性和使用寿命受到影响。

The principles of selecting materials and the methods of reducing potential difference and contact resistance are...

指出提高焊机使用中的可靠性是确保产品焊接质量、延长焊机使用寿命的重要途径。

Good use can prolong the service life of the product.

良好的使用可延长产品的使用寿命。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。