How is drilling done horizontally? What control is used to get the drill from the vertical shaft to the horizontal? I can't get my head round this at all.
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" ... a special tool is used..."
3.35 min in.
www.youtube.com/watch?v=fBQCQ6HL2Yw
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This is pretty sketchty about exactly how the drill goes round corners, but it's interesting.
www.oerb.com/?tabid=242
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