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1)  working life
工作寿命
1.
During the drilling operation of directional wells and horizontal wells, there are many factors that may obviously influence working life of screw drill, which include the usepattern of screw drill, the control of drilling fluid performance, the optimization drilling parameters and operational method, etc.
在定向井、水平井等特殊工艺井施工过程中,螺杆钻具的工作寿命直接影响施工井的生产时效和钻井周期。
2.
Coiled tubing(CT) working life is very short,which is main fact to affect cost of CT services.
连续管工作寿命短是影响连续管作业成本的主要因素之一。
3.
Based on the problem of corrugated roller working life, the study of the behavior for corrugated roller 50CrMo steel and its cyclic heat treatment process was carried out, and the hardness and microstructure of the roller were analyzed.
针对瓦楞辊工作寿命低的问题,对瓦楞辊用50CrMo钢及其热处理工艺进行了试验,并分析了热处理后工件的硬度和显微组织。
2)  service life
工作寿命
1.
Then the service life of the petroleum pipeline containing the crack is predicted in this paper.
以沿管道轴向扩展的疲劳裂纹扩展速率为基础,经过一定的修正,以此分析实际输油管道中较常见的内表面半椭圆裂纹的扩展规律,从而预测出含此种裂纹的管道的工作寿命
2.
This paper analyses the factors influencing the service life of spiral bevel gears on rigs and proposes some measures to improve them.
该文分析了影响钻机弧齿圆锥齿轮工作寿命的因素,并提出了改进措施。
3.
Concrete durability is being quantified,and becoming part of reliability and service life design of reinforced concrete structures.
 混凝土耐久性现在正在向定量化发展,同时正在融入钢筋混凝土结构可靠度和工作寿命设计体系。
3)  operating life
工作寿命
1.
By dissecting the earlier having metal-shell quartz pressure sensor of operating life of oscillations,operating life mechanism of the sensor is analyzed and discussed.
通过对组装式石英谐振压力传感器解剖,分析影响传感器工作寿命的主要因素,并对其深入探讨,提出改善传感器工作寿命的具体措施。
4)  reliability working life
可靠度工作寿命
5)  design working life
设计工作寿命
1.
Design reference period and design working life are two basic variables in structural reliability design.
设计基准期和设计工作寿命是结构可靠度设计中的两个基本概念。
2.
The problems on corrosion forms, durability designing requirements and methods for prolonging design working life of the concrete structure in the environment with liquid corroding medium are discussed in this paper.
讨论了腐蚀破坏的形式 ,液态介质腐蚀条件下混凝土结构耐久性的设计要求以及延长结构设计工作寿命的措施 。
6)  concrete surplus working life
剩余工作寿命
1.
The forecasting methods of concrete surplus working life within the concrete structure,which were published in foreign documents,are investigated in this paper with comprehensive discussion and analysis in details so as to provide reference for domestic engineerin
探讨和介绍了国外文献中所载的混凝土结构中混凝土剩余工作寿命的各种预测方法, 并对各种方法进行了较详细的综合论述和分析, 以供国内工程设计人员参
补充资料:工作寿命
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性质:(一)也称可使用时间、适用寿命、工作寿命。指热固性树脂、黏合剂等,从固化剂、添加剂混入开始,直到体系黏度上升到不能使用的最大时间止,即为可使用时间或适用期。一般适用期随固化剂的种类、添加量以及环境温度等而变化。(二)又称活化期、施工时限。涂料的原始包装打开后,或者回升主催化剂或其他组分后,涂料所能使用的最长时间。此项指标对涂料的施工性能和最终的固化涂层性能都有重要的影响。涂料施工需在适用期内,超过适用期,涂料的黏度、性能将发生改变,例如双组分涂料在施工前混合后,若时间太久则黏度上升、性能下降,甚至胶化而不能使用。

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