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1990-04-07 - 一般社団法人 日本橋梁建設協会 · 2012. 12. 21. · 15 X 44mrn = 660mrn 't, - SM58Qà3 (JIS Z 2242) : SM58Q 426 (kgf/mm2) (kgf/mm2) (0%) (kg-f. m) No. 19

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