... for industrial hydraulic system filter.GP30TTOther different level item GLASS FIBRE FOR HYDRAULIC FILTER•GP05 5μm•GP10 10 ... 2003, Research and Development Automotive air filter material,and Establied Retop Filter Materials Co., LTD •2004, Started ... Non Wovens. •2010, Became the complete Automotive Filter non woven supplier in China •2011, Relocated to ... 26,000 Squaremeters. hydraulic oil filter cloth