日本規格逆止弁の構造長さ
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日標逆止弁H44H-5K A105 DN32の構造長さはいくつですか？ ネットで見つからないんですが、専門家はいらっしゃいますか？
日本規格の旋回式逆止弁、構造長さ、5Kの最小口径はDN50からで、10Kの場合は140となる
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