Founded in 1994, Beijing Dongshan Machinery Co., Ltd. (TSMT) is the chairman of Hong Kong Dongshan Engineering Co., Ltd. (TSE) in 1992, the world's largest seal and damping element manufacturers Germany FREUDENBERG Group sealing and damping technology company (FDS), a wholly-owned Hong Kong-owned company incorporated in Beijing with full responsibility for the sales and promotion of FDS products in the Chinese market, Merkel Freudenberg was established in 1849 to the present day With more than a hundred years of history, in 2006, with a turnover of more than 5 billion euros, it is the world's largest manufacturer of seals and shock absorbers. The world's first skeleton oil seal was invented by Dr SIMMER of Freudenberg. Merkel Freudenberg products are widely used in automobile manufacturing, metallurgical equipment, water conservancy equipment, construction machinery, heavy machinery, forging machinery, plastic machinery, wind power equipment and other fields. Product identification Simrit, CFW, Merkel. MM, MFF. Freudenberg and so on. A: Hydraulic seal: 1: Piston rod seal: U-ring: NI300, T20, T22, T23, T24, TM20 and other seal: OMS-MR, OMS-S and other compression seals: KI310, KI320, S8, etc. V-shaped ring: ES, ESV, etc. 2: Piston seal: U-ring: NA150, NA250, NA300, T18 and other grid to circle: OMK-E, OMK-MR, OMK-S and other compression seals: L27, L43 , Simko300, T19, etc. V-shaped ring: EK, EKV, etc. 3: Wiper: P6, PU5, PU6, PU7, PU8, PU9, PT1, PT2, PU11, etc. 4: Guide belt: KB, SB, SF, KF Etc. Second: Skeleton Oil Seal: 1: Inner Skeleton Seal: BAUX2, BAUSLX2, BAFUDSLX7, BA, BAU, BAUSL; BABSL, etc. 2: Outer Frame Seal: B1FUD, B1FUDSL, B1U, B1, B1SL, 3: S70 without oil seal: R35, R36, R37, R58, etc. 4: High pressure oil seal: BABSL etc. 3: 1: O bar: Standard, German DIN standard, and other specifications. 3: Star: Japanese standard JIS standard, American Standard AS568 standard, German DIN standard, and other specifications. 4; O-ring: JIS standard Japanese standard, American Standard AS568 standard, German DIN standards and other specifications O-ring. Four: new energy industry, wind power seal and shock absorber