下記案件に該当する場合には適格性証明書の再発行を申請する必要があります。
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In order to ensure the quality of pressure-welded joints, welded joints, and mechanical joints, JRJI will undertake the following activities; conduct research and studies on rebar joint-related technology; promote the progress and dissemination of such technologies; and, contribute to the improvement and rationalization of Japanese construction.
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