| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixed method of a hard wooden piece cement slab capable of suppressing the occurrence of cracks in the rigid wooden piece cement slab in the case the hard wooden piece cement slab is fixed to a steel material by means of a nail. SOLUTION: The nail 4 of not less than 500 in Vickers hardness is used when the rigid wooden piece cement slab 2 is fixed to a metal frame 1. COPYRIGHT: (C)2007,JPO&INPIT
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