Scientific, surveying, optical, mechanical, measuring, signaling, control, life-saving and teaching apparatus and instruments, namely, apparatus and instruments for measuring the speed of a vehicle relative to the ground, such as a mode of public transport of passengers and goods, provided, namely, with a measuring wheel and at least one drive wheel of train or buses, namely, tachometers, accelerometers and speedometers; onboard apparatus and instruments for measuring the speed of a vehicle r...