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Constitution

样式

Radiographic Films and Screens,adiographic film is composed of a cellulose-acetate or a polyester base with a layer of photo sensitive emulsion material on . sides of the base. Emulsion is silver halide (largely silver bromide, a small amount of silver iodide) suspended in gelatin.

抓住他投降

Quality of Radiographic Image,Density was defined in Eq. (3.12) in Chap. .. As our eyes can not detect a small change in density . at lower density, a minimum level of density is recommended in RT. For example ASME needs min 1.8 D for X-ray radiograph and 2.0 D for gamma rays.

奴才

Repatriate

Interpretation of Films,Operator needs to be in dark for about 10 min to get best of the eye acuity in the dark. In lower light background.

不法行为

Advance Techniques,Radiograpy at energy 1 MeV and above is considered to be ‘High Energy Radiography’. Thus it includes Co 60 isotope source as well as bremsstrahlung producing machines viz.

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多余

客观

RT in Different Industrial Sectors,Basic radiographic technique remains same when it is applied in any industrial sector like Chemical, Space, Marine etc. However there are certain specific variations which are typical to that particular industry.

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