... hole drilling---Tapping(thread)---Finishing(according to product requirements)---QC/QA---packaging MaterialGrey Iron, Ductile Iron, ... products according to customers drawings or samples2.Software for specification drawings: Pro/E, Auto CAD, solid work ... Silkscreen printing, brushed, sand spray, anodizing, electroplating..Preferred Formats:Pro/E, Solidworks, Unigraphics, Catia, Auto CAD, *.igs, *.stp ...