N
the sound, heard through a stethoscope, made by the rubbing together of the two inflamed layers of pericardium in patients with pericarditis or of pleura in patients with pleurisy 摩擦音
[医学]
And the frictioncoefficientof the rubhasa goodeffecton the absorbereffect of the system too. A largefrictioncoefficient can make the system to work moresteadily.
What is suggested to be at work here is the concept of asperities - the idea that if you take two rough surfaces and rub them together, the peaks in one will couple with the troughs in the other, increasing friction.