腕木の先端.つなぎ梁を結合させる方法を示す/(Top of a bracket. Showing the manner in which tie-beams are held togerher)
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  • 腕木の先端.つなぎ梁を結合させる方法を示す/(Top of a bracket. Showing the manner in which tie-beams are held togerher)

腕木の先端.つなぎ梁を結合させる方法を示す/(Top of a bracket. Showing the manner in which tie-beams are held togerher)

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