sigh007 发表于 2012-3-23 11:03:38

MIL-U-20625

                   MIL-U-20625, MILITARY SPECIFICATION: UNIVERSAL JOINT, BLOCK TYPE, MECHANICAL REMOTE CONTROL SYSTEM (28 MAR 1957)., This specification covers universal joints of the block type for use in rotary type hand-operated or intermittent power operated valve remote control systems of the mechanical type.         
         
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