maculated
发表于 2025-3-25 03:20:25
Carrier Communication Terminals,minals were designed exclusively for telephone conversation. When remote supervision and control entered the picture at some later date, the first carrier terminals built were again of the single-purpose type and their transmission band was chosen so as to fit into the allocation scheme established for the speech frequencies.
积习已深
发表于 2025-3-25 08:05:03
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易受刺激
发表于 2025-3-25 13:16:07
Legacykonzepte der Netzwerkredundanz an appreciably higher mechanical strength. Damage caused by adverse weather conditions is therefore a very rare occurrence. Besides, a power line carrier communication system saves the cost of constructing a separate line.
extract
发表于 2025-3-25 16:11:12
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saphenous-vein
发表于 2025-3-25 22:16:34
https://doi.org/10.1007/3-540-33487-4ne networks. In 1947 the German network included, after deduction of all war-incurred losses and prior to reconstruction after the war, some 580 carrier telephone terminals (Fig. 1). In 1960, some 1500 carrier terminals were in operation alone in Western Germany.
doxazosin
发表于 2025-3-26 02:31:46
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BOAST
发表于 2025-3-26 06:29:24
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NADIR
发表于 2025-3-26 09:39:27
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神圣将军
发表于 2025-3-26 14:29:27
Properties of Power Lines in the Carrier Frequency Range,e most characteristic examples. Transmission was believed to be a space radiation process with wave propagation concen?trated along the power line route. “Line-bound RF transmission” or similar terms were used at that time to distinguish this mode of operation from wireless RF transmission. There is
整洁漂亮
发表于 2025-3-26 20:35:09
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