Kev siv ob lub hnab ntim khoom ntim tau txais txiaj ntsig zoo hauv kev ua lag luam. Cov hnab no yog ib qho kev daws teeb meem rau kev thauj mus los ntawm cov khoom hnyav thiab cov khoom loj. Lawv tau tsim los nqa tau yooj yim thiab ua tau zoo nrog lub crane, forklift, lossis lwm yam khoom siv nqa.
Qhov zoo ntawm ob lub hnab ntim khoom muaj ntau yam. Lawv tso cai rau kev nyab xeeb thiab yooj yim thauj khoom, tsis muaj kev pheej hmoo ntawm lub hnab tawg lossis cov khoom nchuav tawm. Lawv yog tsim los ntawm cov ntaub ntawv zoo thiab tuaj yeem tiv taus cov xwm txheej hnyav xws li huab cua huab cua, kev tuav tsis zoo, thiab kev thauj mus los ntev.
Ntxiv mus, cov hnab no yog cov neeg siv khoom zoo heev thiab yuav tsum tau siv zog tsawg heev los siv. Nrog lawv cov qauv tsim tshwj xeeb, lawv tso cai rau kev thauj khoom sai thiab yooj yim thiab tshem tawm cov ntaub ntawv, ua rau lawv xaiv rau ntau qhov kev lag luam. Lawv tau siv dav hauv kev ua liaj ua teb, kev tsim kho, mining, thiab lwm yam lag luam uas xav tau kev thauj mus los ntawm cov khoom lag luam xws li xuab zeb, gravel, av, cement, thiab lwm yam khoom siv.
Zuag qhia tag nrho, ob lub hnab ntim khoom lag luam tau vam meej vim muaj txiaj ntsig zoo heev uas nws muab rau cov neeg siv. Lawv cov kav ntev, kev ua tau zoo, thiab kev yooj yim ua rau lawv yog qhov kev daws teeb meem zoo tshaj plaws rau kev lag luam thiab kev lag luam tab tom nrhiav kom txhim kho lawv txoj haujlwm thiab txhim kho cov qauv kev nyab xeeb. Nrog rau kev nce qib ntxiv hauv thev naus laus zis thiab cov khoom siv tshawb fawb, lub neej yav tom ntej zoo li ci ntsa iab rau ob lub hnab ntim khoom lag luam.