machine parts, namely, acoustic silencers for electric motors, fans, ventilation units, cooling towers, blowers, compressors, internal combustion engines, turbines, jet engines, scrubbers, gas discharge units, air conditioning units and air discharge stacks

'acoust':4 'air':26,30 'blower':14 'combust':17 'compressor':15 'condit':27 'cool':12 'discharg':24,31 'electr':7 'engin':18,21 'fan':9 'gas':23 'intern':16 'jet':20 'machin':1 'motor':8 'name':3 'part':2 'scrubber':22 'silenc':5 'stack':32 'tower':13 'turbin':19 'unit':11,25,28 'ventil':10

sheet metal enclosures for use as acoustic room silencers

'acoust':7 'enclosur':3 'metal':2 'room':8 'sheet':1 'silenc':9 'use':5

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