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Ffens Gwrthsain yr Ysgol (LRM)
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Rhwystr acwstig twr oeri peiriannau pŵer
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Rhwystr acwstig lliwgar tirwedd
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Rhwystr acwstig ffatri gymunedol
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Rhwystr acwstig uned aerdymheru
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Rhwystr Rheoli Sŵn Dros Dro (TNCB)
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Rhwystr acwstig rheilffordd
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Rhwystr Rheoli Sŵn Parhaol PNCB
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Ffens Gwrthsain Overpass LRM
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Rhwystr acwstig priffyrdd
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Ffens gwrthsain FRP LRM
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