제어밸브 데이터시트의 파이프 사양(Line Size) “57/49”는 무엇을 의미하나요?
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계측 제어 밸브 데이터시트에서, 파이프 사양(Line Size) 57/49는 무엇을 의미하나요?
파이프의 외경은 57mm이고, 내경은 49mm여야 합니다.
보통은 외경과 벽두께만 적는데, 이건 그다지 표준적이지 않습니다.
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