拖累
发表于 2025-3-21 18:05:26
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arousal
发表于 2025-3-21 20:53:19
Communication Circuits in the Power Network,es it provides the shortest connection between the communicating stations. Compared with open-wire communication lines, it has a better insulation and an appreciably higher mechanical strength. Damage caused by adverse weather conditions is therefore a very rare occurrence. Besides, a power line car
Mercurial
发表于 2025-3-22 01:08:04
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Parallel
发表于 2025-3-22 06:31:45
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铁塔等
发表于 2025-3-22 12:07:38
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淡紫色花
发表于 2025-3-22 14:51:31
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淡紫色花
发表于 2025-3-22 20:05:18
Appendix,oth to the power current frequencies of 16 2/3 Hz, 50 Hz and to the carrier frequencies of 15 kHz to 500 kHz as used in power line communication systems. The frequency . refers to the number of oscillations per second, from which the “wave length” can be determined as
严厉谴责
发表于 2025-3-22 22:02:24
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使满足
发表于 2025-3-23 03:46:40
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危机
发表于 2025-3-23 07:29:26
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