Non destructive testing, NDT is a preventative maintenance test procedure that can detect hidden defects without damage to the part being inspected. ( )
A.the NDT detect part' s defects and no damage caused by to the part. B.the NDT can detect the defects on the surface of the part only. C.Non destructive testing, NDT is a preventative maintenance test procedure that can detect hidden defects, but damage may cause to the part being inspected.正确答案A
