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Straight beam (ut)
| Глоссарий терминов по технологиям неразрушающего контроля (NDT) |
A vibrating pulse wave train traveling normal to the test surface.
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Unidirectional voltage, английский
A voltage of which the polarity, but not necessarily the magnitude is constant.
Barn (rt), английский
A very small unit of area used in measuring the cross-sections of atoms, nuclei, electrons, and other particles. one barn is equal to 10-24 square centimeters. the term is a measure of the probability that a given nuclear reaction will occur.
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