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7858; єρтєѕ Tσυυѕ ℓєѕ Ẳмιѕ. Abonne-toi à mon blog! .
Saturday, May 06, 2006. Castings must be sectioned to check metal-wall thickness. The area of dimensional inspection and accuracy involves the entire field of castings utilization by the machine shop. Castings may be sawed up, and the sections examined for soundness. Macro etching may be used to locate suspected shrinkage, porosity or cracks. X-ray or gamma rays are passed through the test piece, and the intensity of transmitted rays is recorded on a photographic film.