Yi Shui Yangdong Machinery Co.,Ltd is the only professional R&D domestic manufacturer which produces automatic hydraulic oil presses and screw oil press .The main product is Wang Quan oil press which has won two national patents (ZL 022 6822.6： ZL 2005 283810.4 ) with advantages such as high-technology content, reasonable design, solidity and durability, high efficiency and energy , saving . The products are sold to all over the world