If indeed the friction coefficient is independent of surface area, then when I tilt them they should start to slide roughly at the same Angle.

若摩擦系数真的，与接触面积没有关系，那么两者下滑时的角度，应该基本相当。

youdao

Should be larger port area to ensure less friction and pressure drop across the valve.

较大开口区域应保证通过阀门较小的摩擦力和压力降。

youdao

Besides, the relationship between the contacting area and the glide friction was analyzed and discussed.

此外还分析了磨砂玻璃板接触面积与摩擦系数的关系。

youdao

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