Nrog rau txoj kev loj hlob ntawm infrastructure nyob rau hauv kev tsim kho kev lag luam, lub tsev cov ntaub ntawv kuj tseem evolved. Tsuas yog los ntawm kev txhim kho tsis tu ncua thiab tsim kho cov txheej txheem ntau lawm, peb tuaj yeem txeeb lub khw nrog qib crushed pob zeb sib xyaw cov nroj tsuag. Daim ntawv thov ntawm cov pob zeb sib tov hauv daim teb no kuj tau dhau los ua ntau thiab ntau dua. Qhov tseem ceeb ntawm nws tuaj yeem pom los ntawm kev lag luam siv tus nqi. Kev tsim kho thev naus laus zis yuav tsum yog lub tswv yim kev lag luam-taw qhia kev txhim kho, thiab thev naus laus zis yuav tsum tau hloov kho lub sijhawm thaum lub sijhawm kev txhim kho los npaj rau kev sib tw ua lag luam yav tom ntej.
Cov nyhuv ntawm cov pob zeb sib tov zoo heev. Lub pob zeb sib tov yog lub tshuab uas sib tov cov cement, xuab zeb thiab gravel aggregates nrog dej thiab sib tov rau hauv ib qho kev sib xyaw ua ke. Cov tsos ntawm lub tshuab zoo li no txo cov neeg ua haujlwm thiab cov khoom siv, thiab ua kom yooj yim rau kev ua haujlwm. Yog li ntawd, yuav ua li cas peb thiaj li siv tau cov khoom seem ntawm cov pob zeb sib tov?
1. Qhov thib ob siv cov khoom siv ntxiv ua cov khoom siv hauv tsev: cov khoom siv sib xyaw ua ke ntawm cov khoom sib tov tuaj yeem siv los ntxiv dag zog rau cov av mos.
2. Raws li cov khoom siv raw rau kev tsim cov pob zeb ua dua tshiab: cov pob zeb ua dua tshiab yog hais txog cov pob zeb uas siv los ntawm cov pob zeb pov tseg los ntawm ib qho txheej txheem. Los ntawm qhov kev txhim kho tam sim no, nws tseem muaj kev cia siab zoo.
3. Raws li cov khoom siv raw rau cov cement rov qab: cov khoom seem ntawm cov khoom sib tov tuaj yeem siv los ua cov khoom siv raw rau cov cement rov qab. Tag nrho qhia txog kev tsim kho kom ruaj khov ntawm kev lag luam.
Cov txheej txheem ntawm kev tsim kho hauv nroog txuas ntxiv mus, cov pob zeb tau siv dav, thiab cov pob zeb sib xyaw kuj tseem txhim kho sai. Peb tau hloov txoj kev tswj hwm microcomputer hauv kev tswj hwm, thiab tag nrho cov kev ua tau zoo tau zoo dua qub. Nws txoj kev lag luam, kev ntseeg siab thiab kev ua tau zoo tau txhim kho, mus txog qib siab thoob ntiaj teb, uas tuaj yeem tsim ib puag ncig thiab txhim kho tib neeg' lub neej zoo.
