▼下端筋2010/01/02 18:58 (C) 株式会社Forex/季楽な家開発奮闘記
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▼下端筋2010/01/02 18:58 (C) 株式会社Forex/季楽な家開発奮闘記
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(C) Stepup Communications Co.,LTD. All Rights Reserved Powered by samidare. System：enterpriz [network media]
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よみ：したばきん
鉄筋コンクリート造のはりや床の下側の主筋。