1.RF wood dryer 2.Faster, more uniform 3.No crack, no bending ... is new drying mechod.(Dielectric heating) Steam and normal vacuum dryer(hot plate) is conductive heating.They dry the wood ... Then vopar will be pump out automatically.So HF cacuum dryer is faster, more uniform, no bending and no crack ... plate (no hot water)The power supply of HF vacuum dryer is electrcity.It does not need boiler, save the ...