06
Chimney shafts of metal, smoke flues of metal for chimneys,
ducts of metal for ventilating and air-conditioning
installations, ducts of metal for central heating
installations, smoke flues, chimney cowls and chimney pots
of metal, clamps of metal for chimney flues, reinforcements
of metal for chimney flues, grilles of metal, junctions of
metal for pipes, covers of metal for chimney flues
11
Apparatus and installations for heating, air-conditioning,
ventilation and steam generation, boiler pipes (tubes) for
heating installations, extractors for ventilation apparatus,
chimney flues, flues for heating boilers
17
Flexible pipes not of metal, chimney flues not of metal,
pipe junctions not of metal, insulating materials and
insulating jackets for chimney flues not of metal, pipe
muffs not of metal
19
Chimney shafts not of metal, smoke flues not of metal for
chimneys, ducts not of metal for ventilating and
air-conditioning installations, ducts not of metal for
central heating installations, smoke flues, chimney cowls
and chimney pots not of metal, clamps not of metal for
chimney flues, reinforcements not of metal for chimney
flues, grilles not of metal
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