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UPVC 소재의 볼밸브, 백압밸브, Y형 필터, 안전밸브, 댐퍼의 각각 표준은 무엇인가요?급해요...

2016-10-25View Original

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UPVC 소재의 볼밸브, 백압밸브, Y형 필터, 안전밸브, 댐퍼의 각각 표준은 무엇인가요?급해요..
Reply #22016-10-25
UPVC 소재의 볼밸브에는 기계부 표준과 화학부 표준이 있으며, 이는 어떤 산업이나 어떤 용도로 사용할지에 따라 달라집니다
Reply #32016-10-25
수처리, 약제를 운반하는 경우의 기준은 무엇인가요?

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