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1·The bolt fastening metal structure of tower crane and pin structure without deformation, no weld crack.

塔吊的紧固金属结构的联接螺栓和销轴，结构件不得有变形，焊缝不得有裂纹。

2·An expert system of welding crack diagnosis based on knowledge base is posed according to the analysis of characteristic of weld crack.

从分析焊接裂纹的特点出发，提出了基于知识库的焊接裂纹诊断专家系统。

3·The hydrogenation pipe would weld crack after running for some time as high temperature and high pressure, and the phenomenon was rare.

高温高压临氢管道运行一段时间发现多道焊缝裂纹，较为罕见。

4·Some new technologies such as infrared thermal imaging, laser holography and microwave testing were prospected in the testing of weld crack.

对红外热成像检测、激光全息检测和微波检测新技术在焊接裂纹检测中的应用进行了展望。

5·Since the beginning of mass production of G70 in 1997 in Xi'an Rolling Stock Works, there has been report on weld crack on bolster web now and then.

西安车辆厂自从1997年开始批量生产G70一来，不时有罐体枕梁腹板立焊缝裂纹的报告。

6·It is proved by application that the expert system of weld crack diagnosis based on knowledge base can achieve the same diagnostic result as the expert.

应用证明基于知识库的焊接裂纹诊断专家系统可以得到与专家同样的诊断结果。

7·Through analysis on inside weld forming and welding procedure of SSAW pipe, it pointed out weld crack is easy to appear in brittle temperature zone in welding pool.

通过对螺旋埋弧焊管内焊缝成型和焊接过程的分析，指出焊缝裂纹易产生在焊接熔池脆性温度区。

8·The application status of magnetic particle testing, penetrant testing, eddy current testing, radiographic testing and ultrasonic testing in weld crack inspector were introduced.

介绍了磁粉检测、渗透检测、涡流检测、射线检测和超声波检测技术在焊接裂纹检测中的应用状况。

9·To do mycology analysis to the blank parent and its cracking weld for different procedure treatment to the blank before welding and occur weld crack during welding forming by different welding method.

用不同焊接方法，对坯料焊前作不同工艺处理，焊接成形时出现焊缝开裂，对其坯料母材及开裂焊缝作显微分析。

10·Since there are weld defects in welds, using traditional strength theory based on no defect and no crack to design, crane's security in rating load can't be insured.

由于在焊缝部位存在焊接缺陷，采用传统的建立在构件无缺陷、无裂纹基础上的强度理论进行设计计算时，往往不能确保起重机在额定载荷下使用的安全性。