使用寿命

So the proposed method in this dissertation not only meet the requirements for fossil-fuel unit set in GB/T 12145-1999, but also can effectively restrain condensate and feed water system corrosion. Thereby the proposed method can reduce the loss by corrosion's leading accident, lower Fe content in boiler feed water, slow the boiler's scaling speed, delay boiler's chemical cleaning interval, effectively enhance unit's reliability, usability and using life and solve the problem of poisonous chemical deoxidant. So the proposed method can economize substantial expense for power plant.

所以，本文所提出的汽包炉有限氧化性水化学工况不但能满足GB/T12145-1999中对火力发电机组及蒸汽动力设备的要求，而且可有效抑制凝结水和给水系统的腐蚀，减少因这些部位腐蚀损坏而引发的事故停机损失，降低锅炉给水中的金属含量，减轻炉内的结垢速度，延长锅炉的酸洗间隔，有效提高机组的可靠性、可用率和使用寿命，同时也解决了有毒化学除氧剂的使用问题，为电厂节省大笔运行费用。

The cylinder of drop forging hammer was improved with oilless lubrication technique.

运用气缸无油润滑技术对模锻锤进行技术改造，使气缸和活塞的使用寿命延长，大大降低了设备的维修费用，也改善了机器的使用性能。

Use of these new oils will help maintain the life of the emission control system as required for regulatory compliance.

对新油的要求使用将能帮助维持散热控制系统的使用寿命。

Elevating the valid time of using the cell, and using the cell more rationally. The MCU AT89C51 was used as its main CPU and combined with display module, A/D converter, expended memory and watch dog technology in order to satisfy the need; a new type of infrared wireless technology was used to transmit the data collected and was given the real circuit design picture.

能更有效、合理地使用和保养电池组，提高电池使用寿命；该系统采用单片机主机AT89C51结合显示、模／数转换、扩展存储和看门狗技术；数据传输采用RS-232串口转红外无线技术进行传输，并给出了具体电路设计图示。

Using the magnesium-carbon-calcium fireproof bricks, the ladle life can be increased up to 2~3 times.

使用该砖后使钢包使用寿命提高了2~3倍。

It has the advantages of long life and maintenance free to use big-power LED product.

它的优点是使用寿命长，免维护使用大功率主导产品。

Long-term use of my company's full range of products that can maintain the whiteness of grass cloth, grass cloth to extend the service life compared to similar products and domestic, has the following advantages. 1, security, environmental protection 2, dosage Province 3, effective 4, 5 easy process, low energy consumption and time to the province.

长期使用我公司的全套产品可保持布草白度，延长布草使用寿命，和国内同类产品相比，具有以下优点。1、安全、环保2、用量省3、效果好4、工艺流程简单5、能耗低、时间省。

Using in the excavator bucket teeth, crusher hammer, ball mill liner, high strength low alloy cast steel has 2-4 times longer servicing life than that of high manganese cast steel, and its production cost is equal to that of high manganese cast steel.

目前已在挖掘机斗齿、破碎机锤头、球磨机衬板等领域成功推广使用，其使用寿命比高锰钢提高2-4倍，生产成本与高锰钢相当。

Based on the analysis of the short life of the bearings in the speed increaser of Morgan finishing unit and elastic spacers and breaking of input shafts,the transformation is made to the output and input shaft bearings and the related parts in the speed increaser ,with the good results.

针对高线摩根精轧机组增速机轴承和弹性垫片使用寿命短，输入轴断轴等事故进行分析探讨，通过对增速机输出轴轴承、输入轴及相关配合零件的改造，取得较好的使用效果。

Based on the analysis of the short life of the bearing s in the speed increaser of Morgan finishing unit and elastic spacers and breaking of input shafts,the transformation is made to the output and input shaft bearing s and the related parts in the speed increaser,with the good results.

针对高线摩根精轧机组增速机轴承和弹性垫片使用寿命短，输入轴断轴等事故进行分析探讨，通过对增速机输出轴轴承、输入轴及相关配合零件的改造，取得较好的使用效果。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。