| 摘要 |
FIELD: investigating and analyzing materials. ^ SUBSTANCE: method comprises making a specimen which is similar to the object to be investigated in shape and material, choosing method and instruments, and determining the maximum possibility to indicate defects by this method. An operator then tests the specimen. The qualification of the operator is judged by comparing the results of testing with the maximum possible detection indication. ^ EFFECT: enhanced reliability of assessment. ^ 5 dwg |
