Lumo lozungulira lokhala ndi mawilo ozungulira otetezedwa a chingwe chachitsulo ndi losavuta kugwiritsa ntchito, lumo limapangidwa ndi chitsulo champhamvu kwambiri, mutu wa lumo uli ndi kapangidwe kodulira kozama, kuluma kwamphamvu, ndi inshuwaransi yotseka, komanso kuteteza kutsetsereka. Kumeta tsitsi kumatha kusinthidwa mosavuta, kugwiritsidwa ntchito m'makona ambiri. Chogwirira chotenthetsera chimagwiritsa ntchito utomoni wamphamvu kwambiri wa epoxy ndi chubu chodzaza ndi thovu chotetezedwa, chomwe ndi champhamvu kwambiri, chogwira bwino ntchito yotenthetsera, kudulako kumakhala kosalala komanso kopanda ma burrs.
Chidziwitso: Mukagwiritsa ntchito ndi mphamvu yamagetsi, valani magolovesi a rabara otetezedwa, sungani mtunda wabwino ndipo tsatirani malamulo onse achitetezo.