... drying oven ,Drying oven ,Intelligent control drying oven . 2.the high vacuum degree warm, durable 3.speed is fast 2011 vacuum drying ovenVacuum drying oven ,Drying oven ,Intelligent control drying oven ... the material to design, can enter the inert gas sufficiently to the interior, specially some ingredient ... have the oxygen or fills in the inert gas environment to carry on, will therefore not oxidize ...