1, thiab qee qhov tsis muaj qhov tsis muaj zog, tsis muaj kev sib zog, cov log tsheb yog tias heaped nrog lub sijhawm ntev cia thiab tsis tig rau lub sijhawm, vim yog extrusion deformation huab cua huv ntu xws li nyem, koj siv tsis tau feem ntau, roj hmab cov roj ntim, v-kab xev, tubing thiab lwm yam tsis tau nyem. Khaws cov khoom siv tiv thaiv kom tiv thaiv tsis txhob xuas tes nyob hauv cov txheej txheem ntawm kev khaws cia nquag swb thiab sau ntawv.
2, huab cua nqus ntawv lim, yog tias cov roj tau txais ntawm cov kua, cov roj siab siab ua kom yooj yim tuaj yeem kos rau hauv lub tog raj kheej thiab muaj feem cuam tshuam rau kev siv cav zoo; yog v-siv cov roj twg ntawm cov kua yuav ua kom cov laus kev xeb dhau; brake, clutch kev sib txhuam disc nrog roj, xws li kua, hem txog kev nyab xeeb. Hauv khw "ntshai" kom nyob deb ntawm cov roj hauv cov roj qhov ntawm cov txheej txheem.
3, txuas ntxiv, qee cov kwv tij nyiam hauv tsev neeg, xws li cua lim. Hauv cov khoom no yuav tsum tau sau tseg tias nws tau khaws huv.
4, qhuav qhuav, thiab ceev faj ntawm cov hluav taws kub thiab cov khoom siv hluav taws xob khaws cia kom them sai sai rau kev tiv thaiv hluav taws, tshwj xeeb tshaj yog roj, pleev xim thiab qhov chaw tsis huv. Cov seem thaum lub sijhawm khaws cia yuav tsum yog hluav taws thiab saib xyuas yuav tsum tsis txhob muab sib cais.
5, roj hmab foob, v-siv tawv, log tsheb thiab lwm yam khoom siv, lub sijhawm ntev cia nyob rau hauv qhov chaw sov siab hauv qab lossis ze qhov chaw tua hluav taws, kev ua haujlwm tsis zoo los ntawm kev laus cuam tshuam rau lub neej; khaws cov khoom siv no yuav tsum muab cia rau qhov chaw txias thiab qhuav, kom xyuam xim rau kev tiv thaiv kev kub nyhiab.
