| http://www.w3.org/ns/prov#value | - Furthermore, the embodiment described above has dealt with the case where the convex projecting parts are provided on the right and left sides of the housing case 10 with the robs 35A and 35B, and 36A and 36B. However, the present invention is not limited to this but also various shaped projecting parts can be provided, such as mountain-shaped projecting parts and projecting parts with waterdrop s
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