异种材料摩擦焊接接头中二维及弥散分布的缺陷,常规无损检测方法很难可靠地检测出,因此必须建立异种材料摩擦焊接质量监控的新方法......

Based on social linguistics and semiotics,sociosemiotics is a renewed perspective to clarify meaning and function of cer......