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Reaction Vessel Lids, 4 Necks Glass Lid and 5/6 Necks PTFE Lid, 45° DN Flanged<br>Perfect Compatibility with 45° DN Flanged Vessel, Chemical & Heat-Resistant, 45° DN 플랜지 반응조 뚜껑, 완벽한 호환성 Reaction Vessel Lids, 4 Necks Glass Lid and 5/6 Necks PTFE Lid, 45° DN Flanged<br>Perfect Compatibility with 45° DN Flanged Vessel, Chemical & Heat-Resistant, 45° DN 플랜지 반응조 뚜껑, 완벽한 호환성