noun
: a file with a surface cut into two series of parallel ridges crossing each other usually at less than a right angle, both ridges being diagonal to the center line of the file
noun
: a file with a surface cut into two series of parallel ridges crossing each other usually at less than a right angle, both ridges being diagonal to the center line of the file
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012