稀释前
发表于 2025-3-25 07:14:43
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Generalize
发表于 2025-3-25 10:54:03
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云状
发表于 2025-3-25 12:07:29
Magnetic Phenomena, of the magnetic field of an electric current in 1820. In this chapter we shall briefly describe the principal kinds of magnetic ordering to be found in solids and shall then go on to consider in more detail the phenomena that are most relevant to electrical engineering
Obituary
发表于 2025-3-25 18:12:55
Materials for Optoelectronics,is field. Of course, significant developments in solid-state devices for the production and detection of light would have taken place without the advent of the near-lossless fibre, but not to the same degree.
LATHE
发表于 2025-3-25 21:25:41
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压倒
发表于 2025-3-26 00:41:13
Conceptualising Indigenous Law,ily produced by thermal oxidation of the silicon substrate, it was highly adherent, was insoluble in water (unlike germanium dioxide), was impenetrable by dopants and could be selectively etched with hydrofluoric acid (HF) to form windows for diffusion.
险代理人
发表于 2025-3-26 07:20:49
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Lice692
发表于 2025-3-26 10:31:41
Indigenous Parliamentary Representation,is field. Of course, significant developments in solid-state devices for the production and detection of light would have taken place without the advent of the near-lossless fibre, but not to the same degree.
ICLE
发表于 2025-3-26 15:51:04
Book 1990, though that epoch-making event was the result of far-sighted research planning by Bell Laboratories dating from a decade or more before: no mere chance discovery, therefore, but the fruition of work which allotted at its inception a vital role to materials. The transistor is now very old hat, but
Osteoporosis
发表于 2025-3-26 20:07:44
Jocelyn Jones,Hannah McGlade,Sophie Davisoniour is that it . explain the relative magnitudes of the resistivities of materials and at least the sign of the temperature coefficient of resistivity (TCR), defined by . where ρ. is the resistivity at a reference temperature, usually 0°C, α is the TCR and ρ is the resistivity at Δ. degrees above (