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Crystal mosaics (ut)
Глоссарий терминов по технологиям неразрушающего контроля (NDT) |
Two or more crystals mounted in the same plane in one holder and connected so as to cause all crystals to vibrate as one unit.
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Multi-directional magnetization, английский
Two separate fields, having different directions, cannot exist in a part at the same time. but two or more fields in different directions can be imposed upon a part sequentially in rapid succession. when this is done magnetic particle indications are formed when discontinuities are located favorably with respect to the directions of each of the fields and will persist as long as the rapid alternations of field direction continue. this, in effect, does constitute two or more fields in different directions at the same time and enables the detection of defects oriented in any direction in one operation.
Differential coils (et), английский
Two or more coils electrically connected in series opposition such that any electromagnetic condition which is not common to the areas of the specimen being tested or the test specimen and the standard will produce an unbalance in the system and thereby be detected.
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