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Deall dulliau profi ASTM ar gyfer ffilm ymestyn peiriant. Dysgwch sut tynnol, gollwng dartiau, rhwyg, glynu, ac mae profion tyllu yn diffinio perfformiad lapio paled go iawn.
Mae ffilm ymestyn peiriant gwrth-dyllu yn atal dagrau ar afreolaidd, paledi miniog. Cymharwch resin, medrydd, a gosodiadau lapio sy'n dal llwythi trwy gludiant.