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DN25 ANSI B16.5 900PLsとは何を意味するのでしょうか？詳しい方、ご説明いただけますか？
DN25、口径は25で、ANSI B16.5が規格です。900PLsというのは、900はおそらくClass900 PLsのことでしょうが、意味がよくわかりません
PLSって何かもわかりません
900classに根拠が見つからないのか？
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