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Kolbe's Electroscope
静电计(230 V, 50/60 Hz)
Electrometer (115 V, 50/60 Hz)
Conducting Sphere, 85 mm
导电球体,30毫米
实验: 库仑定律 (230 V, 50/60 Hz)
实验: 库仑定律 (115 V, 50/60 Hz)