The ornamental design for a floorcleaningmachine, as shown and described.
1. Floor cleaning machine
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Right
1.5 : Left
1.6 : Top
1.7 : Bottom
The broken lines shown in Figures 1.1 through 1.7 are for the purpose of illustrating portions for the floor cleaning machine that form no part of the claimed design.
The floor cleaning machine is to be used for washing and brush cleaning the floors of buildings, offices, factories or the like, and for vacuuming the resulting dirty water.