Equipment for dry polishing and grinding operations

(canceled)

Surface processing equipment comprising two sets of counter-rotating tool holders for processing a concrete surface,

• the equipment comprising a protective cage structure arranged to enclose the sets of tool holders,
• the equipment being arranged to cooperate with a dust extraction system arranged to draw a particle-laden airflow from an interior of the protective cage structure via at least one inlet aperture formed in the protective cage structure, and to capture dust particles in the particle-laden airflow,
• where a dust guide structure configured in dependence of a rotation direction of the air inside the protective cage structure is arranged in the volume between the counter-rotating tool holders to guide the particle-laden airflow to an aperture formed in the protective cage structure.

Surface processing equipment comprising one or more sets of rotatable tool holders for processing a concrete surface, the equipment comprising a protective cage structure arranged to enclose the sets of tool holders,

• the equipment being arranged to cooperate with a dust extraction system arranged to draw a particle-laden airflow from an interior of the protective cage structure via at least one aperture formed in the protective cage structure,
• the equipment comprising an outer skirt arranged around the one or more sets of rotatable tool holders and to seal a volume against the concrete surface, where at least one aperture of the dust extraction system is arranged in the volume, and
• an inner skirt arranged offset from the outer skirt to form a slot there in between, where a gap is formed between the inner skirt and the concrete surface.

22-29. (canceled)