Benchi Yokhala pa Olimpiki: Kukula kwa chubu 50x100mm, ndi makulidwe a 3mm, olimba kwambiri komanso okhazikika, kapangidwe kaukadaulo kakugwiritsa ntchito masewera olimbitsa thupi. Pakupanga, amapangidwa ndi Standard 3-wosanjikiza mphamvu zokutira. mpando wokhazikika wokhala ndi thovu wokhazikika. Zidzatengera inu mwatsopano maphunziro kumverera pa masewera olimbitsa thupi.