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What you should use is as following:
Board material type
I will add the following at what have been mentioned:
Lead free requirements or lack thereof
Allowed deviations from the design files
color of solder mask
Any specifications for controlled impedance
Tolerances for board dimensions, drill registration, drill diameter.
Fire safety rating, if required.
Tooling for PCB edges: V-cut or milling,
PCB outline drawing with tolerances. This may be as simple as a rectangle, but this board's outline consists of 52 line segments
If there's room for it, some shops like to add a quality logo and a production date to the silkscreen.
Thanks for your sharing.It helps me a lot.
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