ZA41T10-300というバルブの型番は、何に基づいて決められているのでしょうか？
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ZA41T8-150、ZA41T10-300というバルブの型番は、何に基づいて決められているのでしょうか？
参考までに、JBT 308-2004 開閉弁の型式指定方法
まずはありがとうございます！JB/T308の作成方法でもなく、米国規格のバルブ仕様書でもありません。
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