Lub khawm, ua ib hom kev ntaus thawb khoom, tau siv ntau lub xyoo dhau los. Tom qab xyoo ntawm txoj kev loj hlob, nws tau siv dav. Yog vim li cas ib lub laub yuav kav ntev mus ntev yog vim nws muaj ntau yam ntxwv, uas tseem muaj nuj nqi zoo: cov qauv yooj yim, yooj yim siv thiab pheej yig. Yog hais tias nqa cov khoom siv dav dav, tus nqi ntawm tus nqi ntawm lub laub yog undoubtedly ib lub tsheb loj heev.
Kev hais txog kev lag luam, nws yog ib qho yooj yim mus xav txog kev lag luam thiab kev lag luam, khw malls, khw muag khoom noj khoom haus, khw muag khoom, tsev qiv ntawv, tsev kho mob, chaw ua hauj lwm thiab lwm yam, vim hais tias tag nrho cov cheeb tsam ntawm lub neej yuav tsis sib cais los ntawm kev sib txuas mus, yuav tsum tau nqa tsheb npav luv luv.
Tau kawg, cov tsheb tam sim no tau tsim ntau heev, thiab lawv cov haujlwm tsis yog rau kev tuav, cia, ua lag luam, thiab lwm yam haujlwm. Kev siv tsev neeg lub cev, nws tuaj yeem siv los tsim cov khoom txhua hnub, txuag qhov chaw thiab kho lub zog; tsev qiv ntawv trolleys ua si lub luag haujlwm loj; laboratory platform, nqa cov khoom siv sim khoom, thiab txhua lub sijhawm ua haujlwm tau txhua lub sijhawm. Los ntawm qhov no, nws tuaj yeem pom tau hais tias qhov kev ua haujlwm ntawm cov ntawv cim npe yog ntau dua thiab ntau dua, thiab qhov khoom thiab kev thov yog ib qho ncaj tshwm sim rau daim ntawv thov ntawm cov tsheb nyob hauv txhua sab.
