DS DS/EN ISO 13691
DS DSEN SO 13691 2003-FEB-26 Petroleum and natural gas ndustres - Hgh-speed specal-purpose gear unts
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This standard specifies the minimum requirements for enclosed, precision, single and double helical, one and two stage speed increasers and reducers of parallel shaft design with pinion speeds of 3000 min-1, or greater, or pitch line velocities of 25 m/s or greater, for special purpose applications.