手輪付きの急速遮断弁の構造原理について、専門家のご指導をお願いします
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経験豊富な方に、ハンドホイール付きの急速遮断弁の構造原理をご教示いただきたい。図があれば幸いです
百度の画像でよく見られるのは、実際には自動運転の制限を設定するだけで、バルブロッドを手動または自動の位置に回すものです。
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