The present invention discloses a method for obtaining a catalyst coated membrane (CCM), including obtaining a friction coefficient of a material to be tested, identifying whether the friction coefficient is within a range from 0.1 to 15 or not, and if so,...

The rubbing behavior monitoring system sends an ultrasonic signal (US) onto one of the two rubbing bodies (2,3) and determines the rubbing behavior by measurement of the Doppler shift of the echo (ES) using a mixer (61) pumped by the oscillator (9) with lo...