U leexi Tube
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ASTM A179 U Laabi Tube Heat Beddelayaasha
Ka dib markaad laabato (qabow samaynaysa), daawaynta kulaylka ee qaybta foorarsiga ayaa laga yaabaa in loo baahdo.Mashiinka dhalisa nitrogen (si loo ilaaliyo dusha tuubada birta ah ee aan birta lahayn inta lagu jiro nuugista).Heerkulka waxaa lagu maamulaa dhammaan aagga kulaylka lagu daaweeyay iyadoo la isticmaalayo pyrometers infrared go'an oo la qaadi karo.
