Kwa mri Doal-chipilala Mri wokhazikika wokha , ndipo aliyense ali ndi nkhawa zosiyanasiyana za izi, ndipo zomwe timachita ndikukulitsa zofunikira za kasitomala aliyense, kotero kuti ma sumlaster a mriwo adalandiridwa bwino ndi mamayiko ambiri. Makina osokoneza bongo okhazikika a Mri omwe ali ndi magwiridwe antchito & njira zothandiza & mtengo wampikisano, kuti mumve zambiri pamudzi wokhazikika wa Mri , chonde khalani omasuka kulumikizana nafe.