Gellir lawrlwytho cynnwys at ddefnydd anfasnachol, megis defnydd personol neu ar gyfer adnoddau addysgol.
Ar gyfer defnydd masnachol cysyllwch yn uniongyrchol gyda deilydd yr hawlfraint os gwelwch yn dda.
Read more about the The Creative Archive Licence.
Disgrifiad
Garn Pit, Blaenavon. June 21st 1890. Showing furnace ventilation stack.
The fan house at Big Pit is agruably the most important building on site. The giant fan housed here provides fresh air for ventilation, pulling out 'foul' air from underground: gases, dust and fumes.
Before mechanical fans were used underground furances or fires would often do the job of ventiating a mine - warming the stale air which travelled up the shafts. But, this brought the obvious danger of explosion if any gas was present underground.
Oes gennych chi wybodaeth ychwanegol am yr eitem hon? Gadewch sylwad isod
Sylwadau (0)
Rhaid mewngofnodi i bostio sylw