The term "industrial" is also heavily debated, as the term usually represents industrial rock (a combination of hard rock/metal and electronic music) in most people's minds while actual "industrial music" generally refers to forms of electronic music that contains sounds similar to machinery or factories, not even nessicarily related to rock music. While most certainly not christian, Nine Inch Nails is usually the first band people think of when they hear the word: "industrial".
There are not many christian bands who play industrial/industrial rock music, but they do exist.
Listing of Christian Industrial Bands/Artists
Argyle Park
AP2
Circle of Dust
Klank
Skillet
Wyrick