YYT255 Sweating Guarded Hotplate wuxuu ku habboon yahay noocyada kala duwan ee dharka dharka, oo ay ku jiraan dharka warshadaha, dharka aan la tolin iyo agabyo kale oo fidsan.
Kani waa qalab loo isticmaalo in lagu cabbiro iska caabbinta kulaylka (Rct) iyo iska caabbinta qoyaanka (Ret) ee dharka (iyo kuwa kale) ee agabka fidsan. Qalabkan waxaa loo isticmaalaa in lagu daboolo heerarka ISO 11092, ASTM F 1868 iyo GB/T11048-2008.