Introduced are the research achievements in improving the service lives of sliding bearing and coupler knuckle, as well as the non destructive inspection for hot cracking in Japan.
介绍日本在提高滑动轴承和钩舌寿命方面的研究成果及车轮热裂的无损检测。
The service content, means, basic process and connotation of non-destructive evaluation (NDE)are analyzed.
对无损评价的服务内容、手段、基本过程及其内涵进行分析。
The service reception is mainly controllable and destructive, but the usage of direct attack for service reception is not in an obvious rise.
接发球主要以控制性和破坏性接发球为主，接发球直接抢攻的使用并未呈大幅升高。
At present, ultrasonic non-destructive testing is usually used in health detection of anchor screws, and it mainly used in detecting inner defect of anchor screws under long term service.
目前，工程上一般采用超声无损检测技术对锚固螺杆进行健康检测，主要是检测经过长期服役后在其内部产生的裂纹或缺陷。
For in-service structure it is difficult to con duct destructive test since its original finger print is hard to obtain.
在役结构因其原始指纹不易获得，使得对其进行损伤检测存在一定的困难。
For in-service structure it is difficult to con duct destructive test since its original finger print is hard to obtain.
在役结构因其原始指纹不易获得，使得对其进行损伤检测存在一定的困难。
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