Appendix A(Reference) The steel surface imageFour images of special relativity for the rusty classification A, B, C, D (see 4.3.2).The image from A Sa 2 1/2 to DFI Special Relativity for the classification of surface preparation methods include methods of cleaning by blowing dry, clean by hand tool or use power clean by flames (see 4.3.6). Other methods such as cleaned by wet blowing method, surface creation can vary in appearance or color ... but the pictures can still be used to give indications for the classification of surface preparation methods.The photographs A Sa 2 1/2 to D Sa 3 take out the steel surface was cleaned by blowing with dry abrasive particles containing quartz sand. The use of abrasive particles in such an enclosed area making obstacles to many areas around unless is controlled under strict conditions. Although there are many other more abrasive form also is used for a method of blowing dry. This abrasive particles can make the surface seem superficially different, even when the surface was cleaned by blowing method.None of the photos depicted A Sa1; A Sa2; A St2 or St3 because this work A can not be achieved and the image exists enough to prove.
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