Firstly, analyse the basic principle and process characteristic of Vacuum Freecing-dry.
分析了真空冷冻干燥基本原理与过程特点。
The vacuum freezing dry technique was applied during the drying process of the faint-scent type oolong tea.
将真空冷冻干燥技术应用于清香型乌龙茶干燥工序(冻干茶)，与冷冻茶和烘干茶进行比较试验。
Papery wallpaper can use the vacuum cleaner, or towel water, wring dry cleaning, cleaning process of forced to light, don't let the water soaked into the seams, after cleaning with cotton cloth wipe.
纸质壁纸可以使用吸尘器吸尘，或将毛巾浸水、拧干后擦拭，清洗过程中注意用力要轻，不要让水渗进接缝处，清洗以后用棉布擦干。
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