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vorbohren n
met.	to rathole
mining.	bore up; drill ahead; hole-in; spud (in); tap; tapered tap
Vorbohren n
mining.	preliminary drilling; primary drilling; rasp-holing; spudding-in (bis zum Ausgangsgestein)
vorbohren v
gen.	to pre-drill
construct.	hole (Schieferplatte)
tech.	prebore; predrill; rough-bore; rough-drill
Vorbohren v
met., mech.eng.	predrill; rough drilling
tech.	pilot drilling; pre-drilling
transp., mater.sc.	pre-drill
Vorbohrer v
tech.	pilot drill-bit