GWIT: afbouwhamer [1] = jack hammer afbouwhamer [2] = percussion-type cutter (om schuine insnijdingen te maken in gesteente) boorhamer [1] = drill hammer; drilling hammer boorhamer [2] = pneumatic hammer drill; jackhammer (pneumatisch) drilboor = bow drill; drill borer OGL: drilboor = hammer drill; percussion drill afbikhamer = chipping hammer; scaling hammer sloophamer = demolition hammer; jackhammer; breaker hammer boorhamer = rotary hammer; rotary drill