(57) Abstract Objective The surface not to slide and be superior in security, in addition the earth and sand and the rubbishTo be the reservoir difficult structure, furthermore appearance beautiful gurechingu is offered. Constitution The framework material 11 which was formed to specified groove lid form and aforementionedTo framework interxylary at specified interval large number the bridge material 12 which is lined up and the aforementioned bridge materialIt is constituted by grid condition with by the twist bar 14 which crosses,It is in gurechingu 10, on top of aforementioned bridge material 12Slot 13 being formed, in the said slot the sand condition no which colorsnsuritsupu material 20 is restoration as one unit and being adhered when alsoIn the mount section which excises aforementioned bridge material top the said bridge material top and the abbreviation aspectThe pattern plotter 30 which possesses one surface is done facilities as one unit shift,ru.
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