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No Name Contens Date Data
1 Impeller for pump using composite structure material and manufacturing method therefor Impeller for pump using composite structure material and manufacturing method therefor 2013.11.28
2 Water gate valve and disk thereof Water gate valve and disk thereof 2012.05.24
3 A sterilizing and purifying apparatus for vessel A sterilizing and purifying apparatus for vessel 2007.12.11
4 Butterfly valve Butterfly valve 2006.08.10