Crane fais fab kev tsheb nqaj hlau yog ib hom kev siv rau cov khoom siv txawb hluav taws xob, nws cov qauv yog ntau yam, tab sis cov ntsiab lus tseem ceeb yog raws li nram no:
Thaum lub xov tooj txawb no khiav ntawm txoj kab khiav dej num, nws xav tau lossi hloov txoj hauj lwm, yog li lub xov tooj ntawm tes yuav tsum tau txais hluav taws xob txhua lub sij hawm nyob rau hauv ntau txoj haujlwm, txwv tsis pub nws tsis txav, ces tus neeg xyuas tus ncej qab yog tso raws khiav ntawm lub xov tooj ntawm tes thiab lub xov tooj ntawm lub tshuab hluav taws xob muaj peev xwm muab hluav taws xob los ntawm cov khoom siv hluav taws xob (uas yog, teeb khoom siv hluav taws xob), yog thaum cov khoom siv txav mus, los ntawm tus neeg tsav tsheb mus muab hluav taws xob kis mus rau cov cuab yeej, yog li ntawd cov khoom siv txhua lub sij hawm, cov neeg sib tw thiab cov khoom siv hluav taws xob li ntawm kab zauv.
Cov npe ntawm kev ruaj ntseg hu rau hauv kev sib txuas lus, uas tseem qhia txog qhov tseem ceeb ntawm tus cwj pwm ntawm cov khoom siv hluav taws xob (los yog cov khoom siv hluav taws xob, lub tshuab hluav taws xob, lub hwj chim) kev sib txuas lus.
Cim npe nrov: crane zog rail, Suav teb, lwm tus neeg, manufacturers, hoobkas, nqe
