망상 밸브
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그물형 밸브의 밸브 플레이트와 완충판 사이의 거리는 현재 대략 얼마인가요? 전문가분들께서 답변해 주시면 감사하겠습니다
이런 밸브는 처음 봐요. 괜찮으시다면 사진 몇 장 보내주실 수 있나요?
사진을 보내줘요, 배우고 싶어요*
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