Describes the different forms and causes of rupture of crank shaft, and suggests actual measures to prolong its serviceable life.
介绍了织机曲轴的断裂形态、原因，提出延长曲轴寿命的具体措施。
The durability design of the concrete structure should be done according to the environment types and the designed serviceable life.
混凝土结构的耐久性设计应根据环境类别和设计使用年限进行设计。
The aeration tube has the advantages of ingenious layout, simple and rational structure, convenient installation, low cost as well as long serviceable life.
该曝气管构思巧妙、结构简单、合理，安装方便，成本低，使用寿命长。
The paper analyzes the forms and causes of cracks of concrete bridges, and the measures taken to prevent the harm of cracks and lengthen the serviceable life.
分析砼桥梁裂缝的表现及其原因，采取有效措施防治砼桥梁裂缝病害，延长砼桥梁的使用寿命。
The concept of cutting tool life-cycle management was put forward, and divided it into four phases: planning period, input time, serviceable life and discarding period.
提出了刀具全生命周期管理的概念，将刀具全寿命周期管理划分为计划期、投入期、使用期、报废期四个阶段。
The concept of cutting tool life-cycle management was put forward, and divided it into four phases: planning period, input time, serviceable life and discarding period.
提出了刀具全生命周期管理的概念，将刀具全寿命周期管理划分为计划期、投入期、使用期、报废期四个阶段。
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