: Such as surface cracks or lack of fusion. Surface Cavities : Such as gas pores or craters.
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In the fluorescent hum of the Quality Assurance lab at Havenbrook Turbines, old Kenji Murata was considered a ghost. He had been a Level III Inspector for thirty-two years, and his colleagues swore he could spot a surface crack on a turbine blade from across the room without his glasses. : Such as surface cracks or lack of fusion