... a non-professional worker also can operate. Scrub, suction at one step Efficiency: 1900 s.q.m Floor ... Scrubber GM50/GM50B Brushing, suction can be done in one step, and floor ... effect and efficiency.2. Fast and convenient: scrub, suction at one step, which clean dirt thoroughly; a non ... off, when sewage water is shut off when suction system power supply will be shut off.Intelligent ...