Definition: Translate the given Spanish text to English
Input: Floor cleaning machine 1, comprising a cleaning system 2, 3, 4, at least one front wheel 5; 5'; 5a, 5b as well as two rear wheels 6a, 6b, 6a', 6b' and a drive mechanism 7; 7a, 7b, wherein the drive mechanism is an electric mono wheel drive and wherein the operator 8 is placed on the machine, characterized in that the operator is standing on a platform 9 which is located above the geometrical axis Z between the two rear wheels, wherein the maximum vertical distance between the platform and the floor is 200 mm.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Maquina limpiadora para pisos 1, que comprende un sistema de limpieza 2, 3, 4, al menos una rueda delantera 5, 5', 5a, 5b, asi como tambien dos ruedas traseras 6a, 6b, 6a', 6b' y un mecanismo de transmision 7, 7a, 7b, en donde el mecanismo de transmision es una traccion electrica con una sola rueda, en donde el operador 8 se coloca sobre la maquina, caracterizada porque el operador se para sobre una plataforma 9 que esta colocada sobre el eje geometrico Z entre las dos ruedas traseras, en donde la distancia vertical maxima entre la plataforma y el piso es de 200 mm.