Thaum nws los txog rau kev nqa cov khoom hnyav hauv ntau yam kev siv hauv kev lag luam,cov tshuab nqa hluav taws xobua lub luag haujlwm tseem ceeb. Ntawm ntau hom hoists, lub hoist tseem ceeb thiab lub hoist pab yog ob qho tseem ceeb uas ua haujlwm sib txawv. Kev nkag siab txog qhov sib txawv ntawm lawv tuaj yeem pab xaiv cov khoom siv zoo rau koj cov kev xav tau.
Lub tshuab nqa khoom tseem ceeb yog tsim los rau kev nqa cov haujlwm hnyav. Nws feem ntau yog lub tshuab nqa khoom tseem ceeb hauv lub crane lossis lub tshuab nqa khoom, uas muaj peev xwm tuav cov khoom hnyav thiab muab lub zog thiab qhov ceev tsim nyog rau kev ua haujlwm zoo. Cov tshuab nqa khoom tseem ceeb feem ntau muaj cov cav tov muaj zog thiab cov tshuab tswj hwm siab heev, ua kom ntseeg tau tias muaj kev ntseeg siab thiab kev nyab xeeb thaum siv cov haujlwm hnyav. Tus nqi hluav taws xob hoist rau lub tshuab nqa khoom tseem ceeb tuaj yeem sib txawv ntau raws li nws lub peev xwm nqa, cov yam ntxwv, thiab hom, tab sis feem ntau nws sawv cev rau kev nqis peev loj dua vim nws lub luag haujlwm tseem ceeb hauv kev ua haujlwm.
Ntawm qhov tod tes, lub tshuab nqa khoom pab ua lub cuab yeej nqa khoom ntxiv. Nws feem ntau siv rau cov khoom thauj me dua lossis rau cov haujlwm uas xav tau kev ua haujlwm ntau dua, xws li kev teeb tsa lossis kev sib dhos ua ke. Cov tshuab nqa khoom pab feem ntau siv ua ke nrog lub tshuab nqa khoom tseem ceeb, uas ua rau muaj kev hloov pauv ntau dua hauv kev ua haujlwm nqa khoom. Txawm hais tias lawv yuav tsis muaj peev xwm nqa khoom zoo ib yam li lub tshuab nqa khoom tseem ceeb, lawv tseem ceeb rau cov haujlwm uas xav tau kev txawj ntse thiab kev tswj hwm. Tus nqi hluav taws xob hoist rau cov tshuab nqa khoom pab feem ntau qis dua li cov tshuab nqa khoom tseem ceeb, ua rau lawv yog cov kev daws teeb meem pheej yig rau cov ntawv thov tshwj xeeb.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-20-2024