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这是测量静摩擦，系数的一种方法。
This is a way that you can measure the static friction coefficient.
youdao
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静摩擦力。当物体在表面静止的摩擦力。
The friction used when an object is laying still on a surface.
youdao
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静摩擦力。当物体在表面静止的摩擦力。
The friction used when an object is laying still on a surface.
youdao