ventilation equipment, namely, an attachment for exhaust ventilation hoses and ducts for producing an air tight seal around varying diameters of vehicle exhaust tail pipes, or other sources of generated pollutants which shall be contained to reduce the exposure to humans or adjacent working atmospheres

'adjac':43 'air':15 'around':18 'atmospher':45 'attach':5 'contain':35 'diamet':20 'duct':11 'equip':2 'exhaust':7,23 'exposur':39 'generat':30 'hose':9 'human':41 'name':3 'pipe':25 'pollut':31 'produc':13 'reduc':37 'seal':17 'shall':33 'sourc':28 'tail':24 'tight':16 'vari':19 'vehicl':22 'ventil':1,8 'work':44

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