implore
发表于 2025-3-28 17:30:29
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以烟熏消毒
发表于 2025-3-28 21:33:04
Introduction to Monomode Fibre Transmission Systems,ues in a field environment and adequate performance was available. These early systems used sources operating in the 850 to 900 nm waveband almost exclusively where fibre attenuations in the range 3 to 6 dB/km are typical. Such technology is typical of virtually all productions systems today.