Building and exterior surface cleaning machines using an air vortex and non-siliceous aggregate in a revolving stream and structural parts thereof

'aggreg':15 'air':9 'build':1 'clean':5 'exterior':3 'machin':6 'non':13 'non-silic':12 'part':22 'revolv':18 'silic':14 'stream':19 'structur':21 'surfac':4 'thereof':23 'use':7 'vortex':10

Cleaning of exterior surfaces of edifices with an installation comprising a vortex jet with air and non-siliceous aggregate in a revolving stream

'aggreg':20 'air':15 'clean':1 'compris':10 'edific':6 'exterior':3 'instal':9 'jet':13 'non':18 'non-silic':17 'revolv':23 'silic':19 'stream':24 'surfac':4 'vortex':12

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