防爆選定の問題
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アンモニア貯蔵エリア……、防爆等級はEx dⅡA T1/Gbに基づいて選定します……。後ろのGbというのは国標を意味するものでしょうか？国標認証。
でも、別の人は防爆という意味だと言っているよ、へへ。
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