eventi principali                     sottoeventi 

come inizia e finisce:       .

come si piega:                .

come si somma:              .

come si moltiplica:          .

interfaccia con il corpo:   .

rapporto interno esterno:  .

evento inizio:     .         .      .         .            .                 .

evento fine:    .       .    .            .             .                    .

 evento copertura:    .        .      .        .       .              .

rapporto impugnatura
con l' asta:       .        .       .       .
                      2.3.9             1.3.9          5.13              5.6
                                             10            10.12.3d        1c.2c.3c

rapporto asta telaio:    .            .            .
                                                              5.9                   6.8.9.10                  5.6
                                                              13                   11.12.13

rapporto telaio copertura:     .       .        .
                                                                           5.10              5.6             1.3.9
                                                                            13                                  10.12
 

rapporto asta punta:      .      .       .
                                                                 5.10              5.6           6.8.9.10
                                                                  13                                11.12.13