It has introduced in detail on structure, Properties and main technical specifications and technical parameters of cored tool.
详细介绍了取心工具的构造、特点及其主要技术规格与技术参数。
2
The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.
回顾了泡沫夹层结构常用的无损检测方法：空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。
3
Introduce the structure and the technology of ring structure iron cored transformer. Analyzed the social influence and economy effect of ring structure iron cored transformer.