凹室
发表于 2025-3-25 07:04:32
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智力高
发表于 2025-3-25 08:43:54
Demagnetization,y. Another common source of difficulty in demagnetization is the equipment available. It is not uncommon to find operators working under great difficulty because they have only 50 or 60 Hz alternating current demagnetizing equipment and the magnetic field was induced by use of full-wave or half-wave
Nebulizer
发表于 2025-3-25 14:20:25
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多嘴
发表于 2025-3-25 18:35:07
Quality control, to admit that anything of their manufacture could be defective is understandable but a little thought on the matter might suggest that the fact that their products are tested should be good for their reputation.
scoliosis
发表于 2025-3-25 23:05:20
Analysis and measurement of magnetic fields,round a bar magnet or a coil wich is carrying current, as shown in Fig. 1.1. There is plenty of clear visible evidence of activity at the ends of these devices but along their lengths there is little or none.
撤退
发表于 2025-3-26 01:49:23
Book 1993l to airborne electromagnetic fields has been current for some years as has discussions to the effects of long wave ultraviolet (UY.A) on human skin. Recommendations as to maximum permit ted exposures over periods of time to both of these phenomena have been put forward and will doubtless form the
Atmosphere
发表于 2025-3-26 06:22:00
f personnel to airborne electromagnetic fields has been current for some years as has discussions to the effects of long wave ultraviolet (UY.A) on human skin. Recommendations as to maximum permit ted exposures over periods of time to both of these phenomena have been put forward and will doubtless form the 978-0-412-44750-1978-94-011-1536-0
hermetic
发表于 2025-3-26 10:28:33
The history and basis of the magnetic particle testing method,hat defects in cannon barrels and other iron components could be detected if they were magnetized and then a magnetic compass were passed over them. No particles were used but the principle of seeking leakage fields was used. It was not until the 1920s that the use of magnetic particles for detectio
Infirm
发表于 2025-3-26 12:48:42
Origins of defects in ferromagnetic materials,a perfect material or a perfect component or structure in the practical world. Taking this as the basis for a definition of a defect is not very helpful as it includes imperfections in the material at an atomic level which cannot be seen even with optical microscopy at one end of the scale through t
NOTCH
发表于 2025-3-26 18:14:43
Essential magnetic characteristics for magnetic particle inspection,g of magnetic particle inspection beyond the automatic following of a procedure. It is fully appreciated that the introduction of equations and vector mathematics deters many inspectors and operators and for this reason equations have been kept to a minimum and manipulation of vectors avoided.