各位版主好，我对STL语句一点不理解，哪位知道下面的是什么意思呀？

      L     S5T#1S
      A     "X007S51/A8"                          I44.1
      AN    "+340_351S1"                      I56.0
      SD    "T 213"                                  T213
      A     "T 213"                                     T213
      AN    "X007S51/A7"                          I44.0
      =     "+340_370-Y1R"                    Q44.0

谢谢。