Tender For bid to ras corrigendum : providing of custom bid for services - half yearly servicing and annual calibration of rockwell vickersmicrovickersbrinell hardnesstester machine up to 500 kgf including type standardopticalmoterised as per annexure attached,custom bid for services - half yearly servicing and annual calibration of rockwell vickersmicrovickersbrinell hardnesstester machine above 500 kgf including type standard optical moterised as per annexure attached