Thermostatic control valves as parts of heating installations; control valves for thermal transfer devices and thermal transfer units

'control':2,9 'devic':14 'heat':7 'instal':8 'part':5 'thermal':12,16 'thermostat':1 'transfer':13,17 'unit':18 'valv':3,10

Metal pipes, namely, hydronic pipings structures used for HVAC systems, thermal transfer devices and thermal transfer units

'devic':13 'hvac':9 'hydron':4 'metal':1 'name':3 'pipe':2,5 'structur':6 'system':10 'thermal':11,15 'transfer':12,16 'unit':17 'use':7

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