比目鱼
发表于 2025-3-28 15:55:41
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缺乏
发表于 2025-3-28 19:40:24
Very Low-Frequency Electromagnetic Method: A Shallow Subsurface Investigation Technique for Geophysproach utilizes signals transmitted from worldwide transmitters located in coastal areas in the 5–30 kHz frequency band, it is suitable to depict conducting structures up to 200 m depth in highly resistive terrain. Freely and readily available primary field signals anywhere around the Earth make the
BILE
发表于 2025-3-29 02:37:23
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外向者
发表于 2025-3-29 04:19:57
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