Close up of Air Conditioning Repair team use fuel gases and oxygen to weld or cut metals, Oxy-fuel welding and oxy-fuel cutting processes, repairman on the floor fixing air conditioning system

Close up of Air Conditioning Repair team use fuel gases and oxygen to weld or cut metals, Oxy-fuel welding and oxy-fuel cutting processes, repairman on the floor fixing air conditioning system (Close up of Air Conditioning Repair team use fuel gases a