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【毎日一問】工程基礎知識(選択問題)20191230

2019-12-30View Original

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この投稿は最後にHP0377によって2019-12-30 06:30に編集されました。乾式消火器は消火時にBには使用してはなりません。 A、油類火災 B、電気機器および貴重な機器の火災 C、木材類の火災 D、いずれの火災も

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