| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that cannot cope with requirement such as a horizontal polarized wave is desired to be cut off or a vertical polarized wave is desired to be cut off without having any interior finishing building material of high cutting-off performance, particularly, for the horizontal polarized wave or the interior finishing building material of high cutting-off performance, particularly, for the vertical polarized wave. SOLUTION: In the interior finishing building material mainly comprising plaster kneaded by adding water, calcium silicate kneaded by adding water or a synthetic resin and formed to mix a plurality of conductive wire materials 2 of prescribed length, the plurality of the conductive wire materials 2 are directed to the same direction.
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