Lub tshav kub kub ntawm Asphalt

Lub tshav kub kub kom kub liphalt yuav tsum tsis pub tshaj 170°C kom tsis txhob muaj aging.

Ncua sij hawm ntev yuav ua rau deterioration. Thaum uas tuav prolonged insulation, Qhov kub yuav tsum tau khaws hauv qab no 100°C.