带有平台和卡钉的滑轮
滑轮组
Experiment: Harmonic Oscillation of a String Pendulum (230 V, 50/60 Hz)
Experiment: Harmonic Oscillation of a String Pendulum (115, 50/60 Hz)
Experiment: Lengths and Volumes, Supplement
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![功率函数生成器（230 V，50/60 Hz）, 1009957 [U8533600-230], 信号函数发生器](/thumblibrary/U8533600-230/U8533600-230_01_140_140_功率函数生成器-230-V-5060-Hz.jpg)