Zokhudza izi: Gawo lophunzitsira la kuvulala ndi kutaya magazi lomwe lingavalidwe lili ndi mabala awiri oyeserera (mabala owombera ndi ming'alu), ndipo lili ndi mtsempha wamagazi woyerekeza womwe ungagwiritsidwenso ntchito, thumba lamagazi lopanikizika, sirinji, ndi thumba lonse losungiramo. Khungu loyerekeza la silicone limatsanzira kapangidwe ka khungu la munthu. Zochitika za mabala zikufanana kwambiri ndi zochitika zachipatala zadzidzidzi. Likhoza kuthiridwa mobwerezabwereza ndi madzi kuti liyerekeze kutuluka magazi kwamphamvu, kuphimba kwathunthu njira yonse yomangira, kutaya magazi, ndi kusamalira mabala. Seti yonse ya zowonjezera ndi yolimba komanso yosavuta kuyeretsa, ndipo kapangidwe kotetezeka kamalola anthu angapo kuchita mobwerezabwereza. Zimawonjezera luso lothandiza la ophunzira pakuyendetsa mabala, kutaya magazi, ndi kumanga mabandeji, ndikukweza njira yophunzitsira zachipatala zadzidzidzi m'mabungwe ophunzirira. Ichi ndi chinthu chofunikira pazochitika zingapo m'mabungwe ophunzirira ndi ntchito zachipatala zadzidzidzi. Seti yonse imapereka phindu lalikulu, mitengo yayikulu yogwiritsiranso ntchito zowonjezera, kutayika kochepa pambuyo pogulitsa, mitengo yokhazikika yoguliranso pamsika, ndikukulitsa gulu lopanga phindu la zida zachipatala zadzidzidzi. Zipangizo zachipatala zadzidzidzi zimagwiritsa ntchito kapangidwe kabwino ka anthu onse. Kuyeserera kwa bala ndi kapangidwe ka magazi otuluka m'magazi kwatsimikiziridwa kudzera mu maphunziro ndi maphunziro amakampani, zomwe zimapangitsa kuti zigwirizane ndi machitidwe ophunzitsira zachipatala zadzidzidzi zapadziko lonse lapansi komanso zapadziko lonse lapansi. Ma seti athunthu alipo kuti aperekedwe nthawi yomweyo.