In the past the crystallizer was made of a deoxidized copper with a good thermal conductivity.
以往，结晶器是选择导热性良好的脱氧铜制作的。
Excellent wear resistance and pressure resistance, good thermal conductivity, low-permeability.
极佳之耐磨，耐压性，良好热导性，低透气性。
The natural nonctystalline graphite sand has good thermal conductivity and thermal reservasion.
天然无定形石墨砂具有良好的导热性和蓄热性。
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