Examination by ultrasonics of bodies having a non-planar surface
作者： Thomas G Brown
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lens.org 参考文章(3)
Douglass H Howry, Ultrasonic method and apparatus for investigating the interior structure of solid bodies ,(1956)
Luther G Simjian, Supersonic exploring device ,(1954)
Yates Henry George, Improvements in or relating to the detection of cracks in engineering components ,(1953)