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Rhan 2 https://cy.welongcasting.com/uploads/38694/info/n202508060819356b3c6.jpg https://cy.welongcasting.com/info/what-are-the-characteristics-of-the-horizontal-17499731578610688.html Beth yw nodweddion y llinell castio llorweddol https://cy.welongcasting.com/uploads/38694/info/n202507280846345e9f8.jpg https://cy.welongcasting.com/info/part-2-summary-of-the-properties-of-silicon-c-17499731583951872.html Rhan 2 Crynodeb o briodweddau silicon, cromiwm, alwminiwm a haearn bwrw sy'n gwrthsefyll gwres nicel https://cy.welongcasting.com/uploads/38694/info/n20250731112231f3df7.png https://cy.welongcasting.com/info/part-1-a-compilation-of-common-process-problem-17499731611149312.html Rhan 1 Casgliad o broblemau proses gyffredin wrth normaleiddio haearn hydwyth https://cy.welongcasting.com/uploads/38694/info/n202508081114219c2c5.png https://cy.welongcasting.com/info/warm-forging-17555218915894272.html Ffug cynnes 1 https://cy.welongcasting.com/uploads/38694/info/n2025091009365521f8e.png https://cy.welongcasting.com/info/reference-for-conversion-between-brinell-hardn-17555218916107264.html Cyfeirnod ar gyfer trosi rhwng caledwch Brinell a chaledwch rockwell haearn hydwyth cyffredin https://cy.welongcasting.com/uploads/38694/info/n20250829082955640c2.png https://cy.welongcasting.com/info/part-3-a-compilation-of-common-process-problem-17555218921137152.html Rhan 3 Casgliad o broblemau proses gyffredin wrth normaleiddio haearn hydwyth https://cy.welongcasting.com/uploads/38694/info/n20250820084323adac3.png https://cy.welongcasting.com/info/part-1-common-defects-of-ductile-iron-produce-17555218932458496.html Rhan 1-diffygion haearn hydwyth a gynhyrchir gan broses castio ewyn coll https://cy.welongcasting.com/uploads/38694/info/n2025082908321869297.png https://cy.welongcasting.com/info/causes-and-prevention-methods-of-orange-peel-d-17555218943550464.html Achosion a dulliau atal diffygion croen oren ar wyneb tywod wedi'i orchuddio - lludw haearn bwrw https://cy.welongcasting.com/uploads/38694/info/n20250820090417694a4.jpg https://cy.welongcasting.com/info/part-1-the-main-defects-of-gray-iron-castings-17555218953479168.html Rhan 1 Mae prif ddiffygion castiau haearn llwyd a achosir gan fwyndoddi ac arllwys a'u hachosion a'u hatal a'u rheolaeth yn cael eu dadansoddi fel a ganlyn: https://cy.welongcasting.com/uploads/38694/info/n20250820085603f7a65.jpg https://cy.welongcasting.com/info/what-adverse-effects-will-the-us-tariffs-on-ch-17555218954314752.html Pa effeithiau andwyol y bydd tariffau'r UD ar Tsieina yn eu cael ar y diwydiant ffowndri? https://cy.welongcasting.com/uploads/38694/info/n202508200900293a9fc.jpg https://cy.welongcasting.com/info/the-relationship-between-the-shrinkage-rate-of-17555218957591552.html Y berthynas rhwng cyfradd crebachu castiau dur a chynhyrchu diffygion crac https://cy.welongcasting.com/uploads/38694/info/n202508200902055703d.png https://cy.welongcasting.com/info/what-is-the-principle-of-melting-metal-in-a-me-17555218958328832.html Beth yw'r egwyddor o doddi metel mewn ffwrnais drydan amledd canolig? Beth yw manteision ac anfanteision toddi ffwrnais drydan? https://cy.welongcasting.com/uploads/38694/info/n20250829082019fcfd0.png https://cy.welongcasting.com/info/part-1-analysis-of-causes-of-defects-in-gray-c-17555218962818048.html Dadansoddiad o achosion diffygion mewn haearn bwrw llwyd a mesurau ataliol https://cy.welongcasting.com/uploads/38694/info/n2025082008453273ed1.png https://cy.welongcasting.com/info/what-is-the-gap-between-the-quality-of-domesti-17555218963522560.html Beth yw'r bwlch rhwng ansawdd castiau domestig a gwledydd datblygedig beth yw'r rhesymau https://cy.welongcasting.com/uploads/38694/info/n20250829082552bf757.jpg https://cy.welongcasting.com/info/the-basic-processes-of-powder-metallurgy-17555218964636672.html Prosesau sylfaenol meteleg powdr https://cy.welongcasting.com/uploads/38694/info/n20250919112504359e7.png https://cy.welongcasting.com/info/hot-forging-17555218973533184.html Ffugio poeth https://cy.welongcasting.com/uploads/38694/info/n20250919092401ab433.jpg https://cy.welongcasting.com/info/the-relationship-between-the-diameter-and-leng-17555218973647872.html Y berthynas rhwng diamedr a hyd peli graffit mewn haearn hydwyth ac ansawdd castiau haearn hydwyth https://cy.welongcasting.com/uploads/38694/info/n20250829082719c24fc.png https://cy.welongcasting.com/info/warm-forging-part-17555218982970368.html Ffugio cynnes rhan 2 https://cy.welongcasting.com/uploads/38694/info/n2025091009381635b04.png https://cy.welongcasting.com/info/part-2-common-defects-of-ductile-iron-produce-17555218986230784.html Rhan 2-diffygion haearn hydwyth a gynhyrchir gan broses castio ewyn coll https://cy.welongcasting.com/uploads/38694/info/n2025082908331303850.png https://cy.welongcasting.com/info/addition-and-adjustment-of-resin-and-curing-ag-17555219002991616.html Ychwanegu ac addasu asiant resin a halltu yn y broses tywod resin 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Rhan 2 Mae prif ddiffygion castiau haearn llwyd a achosir gan fwyndoddi ac arllwys a'u hachosion a'u hatal a'u rheolaeth yn cael eu dadansoddi fel a ganlyn: https://cy.welongcasting.com/uploads/38694/info/n20250820085614bef42.jpg https://cy.welongcasting.com/info/summary-of-knowledge-on-foam-pyrolysis-in-lost-17555219046917120.html Crynodeb o'r wybodaeth am pyrolysis ewyn yn y broses castio ewyn coll https://cy.welongcasting.com/uploads/38694/info/n20250829082839c8a39.png https://cy.welongcasting.com/info/summary-of-investment-casting-knowledge-17555219052045312.html Crynodeb o Wybodaeth Castio Buddsoddi https://cy.welongcasting.com/uploads/38694/info/n20250910092830f29dd.png https://cy.welongcasting.com/info/hot-forging-measurement-of-temperature-17555219052291072.html Ffugio poeth: mesur tymheredd https://cy.welongcasting.com/uploads/38694/info/n2025091909260071f9c.jpg https://cy.welongcasting.com/info/part-6-casting-defects-17555219055436800.html Rhan 6 Diffygion Castio 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