A technique to share a local oscillator signal between two radio frequency integrated circuits. The drum washing machine includes a main body having an entrance hole for placing laundry therein and a door opening and closing the entrance hole, a tub installed in the main body and having an opening corresponding to the entrance hole, a packing member to seal a space between the opening of the tub and the entrance hole. The wood casing has an inner side facing the skeleton, and a deformation space is provided in deformation direction between the inner side of the wood casing facing the skeleton and the skeleton in the predetermined deformation zones. The servo control module generates a first and a second control signal according to the detection signal.