STAS 12289-1985 ABRASIVE MATERIALS FOR COATED ABRASIVES Grains《研磨材料涂上一层有磨蚀作用的颗粒 》.pdf

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STAS 12097-1984 CHROMO DUPLEX BOARD (COATED) )《多彩石印版两层板（涂上一层的） 》.pdf

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