PVCバルブ
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PVC バルブに関する国家規格はありますか?アドバイスをお願いします、ありがとうございます！
私はこの種のものと接触したことはありませんか？ GB/T 10002.3-2011 給水用硬質ポリ塩化ビニル (PVC-U) バルブ
工業用塩ビ管のバルブ規格はありますか？アドバイスをお願いします、ありがとうございます！
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