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Adrodd fel Amhriodol

Testun Gwreiddiol (Anodiad: EPW012973 / 2176657)

' Number two shaft, also known as the return airway shaft stale air and mine gases where suked out the mine viea this shaft, The system was that as the stale air was being sucked out of the mine at number two shaft fresh air would be sucked down number one shaft to replace the stale air being suked out of the mine. '

Dywedwch wrthym pam mae’r cynnwys hwn yn amhriodol *(gofynnol)

Dewis categori *(gofynnol)

Os ‘Arall’ rhowch fanylion (dewisol)

Eich enw (dewisol)

Eich cyfeiriad e-bost (dewisol)

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