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考核实验 14-2 利用砝码和弹簧测力计探究杠杆平衡的条件
时间:2023-02-23
考核實驗 14-2 利用砝碼和彈簧測力計探究杠杆平衡的條件
時間:2023-02-23
Examination experiment 14-2: Use the weight and spring dynamometer to explore the conditions of lever balance
time:2023-02-23

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