> >0.25 mm : 2000 drills.
> >0.30 mm : 1400 drills.
> >0.35 mm : 7800 drills.
> >0.40 mm :  600 drills.
> >0.50 mm :  450 drills.
> >0.55 mm : 2000 drills.

Consider rocketry people - for injectors

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