The substitution of evacuated powders for high vacuum alone will usually improve the insulation by reducing the radiant heat transfer.
只需用抽空气体的粉末而不用单纯的高真空，一般便可减少辐射热传输，从而提高绝缘度。
The high-strength vacuum heat insulation plate of the invention has high strength, low thermal conductivity and good high temperature resistance.
本发明高强度真 空绝热板，不但强度高，而且导热系数低、且耐高温性能好。
The high-strength vacuum heat insulation plate of the invention has high strength, low thermal conductivity and good high temperature resistance.
本发明高强度真 空绝热板，不但强度高，而且导热系数低、且耐高温性能好。
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