Karfe na musamman don fitarwa
Takaitaccen Bayani:
Wani sashi mai siffa mai siffa mai jujjuyawar juzu'i tare da takamaiman sashe da aka yi akan saman silinda ko matrix conical.An raba zaren zuwa zaren cylindrical da zaren conical bisa ga siffar iyayensu;Za a iya raba shi zuwa zaren waje da zaren ciki gwargwadon matsayinsa a jikin mahaifa, kuma za a iya raba shi zuwa zaren triangular, zaren rectangular, zaren trapezoidal, zaren serrated da sauran zaren siffofi na musamman gwargwadon siffar sashe (siffar haƙori).