配管単線図にある200 RJ 110とは何ですか？
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配管単線図にある200 RJ 110とは何ですか？皆様、ご指導をお願いします
第一反応 公称直径：DN200 密封面：RJ 圧力等級：PN110（CL600）
DN200 PN110 密封面：RJ
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