noun
: a machine for simultaneously boring parallel holes (as the crankpin holes of locomotive driving wheels) so that the center line of one will be 90 degrees ahead of the center line of the other
noun
: a machine for simultaneously boring parallel holes (as the crankpin holes of locomotive driving wheels) so that the center line of one will be 90 degrees ahead of the center line of the other
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012