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Nov 22, 2019 Sut i wahaniaethu rhwng peiriant torri hydrolig a pheiriant torri trosglwyddi...Sut i wahaniaethu rhwng peiriant torri hydrolig a pheiriant torri trosglwyddiad mecanyddol
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Nov 09, 2019 Sut i farnu'r peiriant torri hydrolig yn gywirSut i farnu'r peiriant torri hydrolig yn gywir
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Nov 08, 2019 Egwyddor gweithio peiriant torri hydroligEgwyddor gweithio peiriant torri hydrolig
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