                         1958                 1960   WR-13                          1963                     1984                                                       20                                                                193     270           5000                            50                      SBE-6       SB-16       SR3       SR60                                                                       SR2    1980                                         SL-3           1984              1985                                    1998                                                      1999                     2000                                                                             274           1929.3    