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  • E04F17/00
    		•  Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D) HB CC 2E111
  • E04F17/02
    		•  .for carrying away waste gases, e.g. flue gases (free-standing chimneys E04H 12/28; connections between fireplace and chimney, chimney fittings, covers for cleaning holes of chimneys F23J; chimney tops F23L); Building elements specially designed therefor, e.g. shaped bricks or sets thereof HB CC 2E111
  • E04F17/02@A
    		•  Arrangements for removing waste gases HB CC 2E111
  • E04F17/02@B
    		•  .Details of arrangements for removing waste gases HB CC 2E111
  • E04F17/02@C
    		•  ..Holes or grooves for removing waste gases HB CC 2E111
  • E04F17/02@Z
    		•  Others HB CC 2E111
  • E04F17/04
    		•  .Air-ducts or air channels HB CC 2E111
  • E04F17/04@A
    		•  Intake and exhaust arrangements HB CC 2E111
  • E04F17/04@B
    		•  .Details of intake and exhaust arrangements, e.g. intake ports, exhaust ports HB CC 2E111
  • E04F17/04@C
    		•  ..Intake or exhaust holes or grooves HB CC 2E111
  • E04F17/04@Z
    		•  Others HB CC 2E111
  • E04F17/06
    		•  .Light shafts, e.g. for cellars HB CC 2E111
  • E04F17/06@A
    		•  Lighting arrangements or means HB CC 2E111
  • E04F17/06@B
    		•  .Details of lighting arrangements HB CC 2E111
  • E04F17/06@Z
    		•  Others, e.g. with other functions HB CC 2E111
  • E04F17/08
    		•  .for receiving utility lines, e.g. cables, pipes (covers giving access to the ducts or channels, covers of inspection holes E04F 19/08) [6] HB CC 2E111
  • E04F17/08@A
    		•  of cylindrical holes HB CC 2E111
  • E04F17/08@B
    		•  of groove holes HB CC 2E111
  • E04F17/08@Z
    		•  Others HB CC 2E111
  • E04F17/10
    		•  .Arrangements in buildings for the disposal of refuse (refuse bins, gathering or removal of refuse B65F) HB CC 2E111
  • E04F17/10@A
    		•  Refuse unloading arrangements for medium to high buildings HB CC 2E111
  • E04F17/10@B
    		•  .Details of refuse unloading arrangements HB CC 2E111
  • E04F17/10@C
    		•  ..Loaders HB CC 2E111
  • E04F17/10@D
    		•  ..Unloaders or storage units HB CC 2E111
  • E04F17/10@E
    		•  .with accessories, or accessories HB CC 2E111
  • E04F17/10@G
    		•  Refuse unloading arrangements for low buildings HB CC 2E111
  • E04F17/10@H
    		•  .Details of refuse unloading arrangements HB CC 2E111
  • E04F17/10@Z
    		•  Others HB CC 2E111
  • E04F17/12
    		•  ..Chutes HB CC 2E111
  • E04F17/12@A
    		•  Chutes HB CC 2E111
  • E04F17/12@B
    		•  .Detail of chutes HB CC 2E111
  • E04F17/12@C
    		•  .with accessories, or accessories HB CC 2E111
  • E04F17/12@Z
    		•  Others HB CC 2E111
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