He aha te rivet matapo kua kati?

He momo hou te rivet matapo kati. Ehara i te mea ko ngā āhuatanga o te rivet kati he watea te whakamahinga, he pai te mahi, he iti te haruru, ā, ka taea hoki te whakaiti i te kaha o te mahi e pā ana ki te rivet matapo.