Harmonic Motion: experimental board, spring weight, loaded board, counterpoise, stopwatch.

简谐运动：实验板，弹簧秤，载重板，砝码，码表。

youdao

Harmonic Motion: experimental board, spring weight, loaded board, counterpoise, stopwatch.

简谐运动：实验板，弹簧秤，载重板，砝码，码表。

youdao