the design of a chair on the.;in order to see the current family of the chair leg cover, in use, to move each of the broken off, to avoid the use of the machine, the base plate and the bottom of the chair back is easy to damage compared with other parts of the board will have to replace the material to be used, under the chair mat covered with the use of the plate and prevent damage of the material, a part of the contact part of the convex and concave parts at the same time make the massage movement can be. therefore, to promote blood circulation, can be with the characteristics of the liner is provided.
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