English Tech/Engineering Nuclear Eng/Sci engineering/scanning/X-ray production/image processing/industrial scanner_possibly translated from Chinese

Hello.
I am translating some documentation (originally written in Chinese, I assume, because it belongs to a Chinese company) on an industrial scanner (x-ray inspection system) to be used in airports, customs, railway stations and similar places for detecting drugs, weapons, explosives and other materials hidden within other objects.

In this context, I don’t understand the meaning of “faultage”.
I first thought it could mean “fault”, “crack” or “surface irregularity”, but I found a glossary where it is given as a synonym with “dislocation, disturbance, displacement, shifting” (http://library.thinkquest.org/03oct/00904/eng/szoj.htm).

The word appears in the following paragraph:

“After inspected articles entered into tunnel and covered light barriers, testing signals of light barriers would be sent to control unit to start X-ray launcher to produce X-rays. X-ray would be emitted from collimator, scan ***article’s faultage of 1mm*** for a few milliseconds, and then penetrate inspected article and reach detector.

(…) With inspected article being sent into tunnel at the even speed, system scans inspected articles ***faultage by faultage***, the processed X-ray images of articles are shown on the screen of monitor column by column. After all **faultage images** of inspected articles are combined, its intact X-ray image is formed.”

Could someone help me with this?
Millions of thanks in advance,
Manuel