超音波 펄스를 이용한 摩擦熔接 品質의 非破壞的 評價에 관한 硏究= (A )Study on the nondestructive evaluation of friction welded joint quality using ultrasonic pulse-echo method
- Issued Date
- 1987
- Type
- Dissertation
- Publisher
- 釜山水産大學
- Appears in Collections:
- 기타 대학원 > 기타 학과 (Other Departments)
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