... , S390/SS1.2, S330/SS1.0, S280/SS0.8, S230/SS0.6, S170/SS0.5, S110/SS0.3 steel shotsteel gritpurposeS780/SS2.5S660/SS2 ... structure,surface treatment before painting,shot peening of work pieceS280/SS0.8S230/SS0.6G25/SG1.0G40/SG0.7surface cleaning of small -sized ... ,steel pipes,section and steel structure,shot peening of workpieceS170/SS0.5S110/SS0.3G50/SG0.4G80/SG0.3G12/SG0.2surface cleaning of ...