Because of the oilless self-lubrication characteristic in ceramic, the bearing may overcome lubrication problems in an ultra-high vacuum environment. 因陶瓷材料獨具的無(wú)油自潤滑特性，故在超高真空環(huán)境中，可克服普通軸承無(wú)法實(shí)現潤滑的難題。
The vacuum pump is used to provide a vacuum environment for the freezing-drying cabinet and the condensers so as to enable the moisture in the materials to sublimate in the vacuum. 真空泵的作用是給凍干箱和冷凝器提供一個(gè)真空環(huán)境，使物料的水份可以在真空下進(jìn)行升華。
