| 摘要 |
PROBLEM TO BE SOLVED: To solve damages caused by rats by placing a preventing tool in a ceiling of a house to refuse the invasion of the rats. SOLUTION: This rat invasion-preventing tool is characterized by bundling/fixing a plurality of steel needles (21, 22, 23---) having sharp tip ends with a central joining terminal (11) in an almost equivalent distance as radiating in upward direction, and also installing a plurality of similar steel needles (31, 32, 33---) in the almost same distance as radiating in downward direction. COPYRIGHT: (C)2005,JPO&NCIPI
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