Maintenance and/or repair of heating, ventilating and air conditioning (HVAC) systems, airconditioning systems, plumbing installations, septic tank systems, and refrigeration systems

'air':8 'aircondit':12 'and/or':2 'condit':9 'heat':5 'hvac':10 'instal':15 'mainten':1 'plumb':14 'refriger':20 'repair':3 'septic':16 'system':11,13,18,21 'tank':17 'ventil':6

Plumbing fittings, namely traps for heating, ventilating and air conditioning (HVAC) systems, air-conditioning systems, plumbing installations, septic tank systems, and refrigeration systems

'air':9,14 'air-condit':13 'condit':10,15 'fit':2 'heat':6 'hvac':11 'instal':18 'name':3 'plumb':1,17 'refriger':23 'septic':19 'system':12,16,21,24 'tank':20 'trap':4 'ventil':7

CONDE-TRAP

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