安全技術交流版 毎日一問（2016.6.15）
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この投稿は最後に68589544によって2016-6-19 10:26に編集されました。1.jpg（選択問題）シートベルトの寿命は一般的に3～5年です。( )年間使用した後は、批次ごとに抜き取り検査を行う必要があります。 A．3 B．4 C．5 D．6 A
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