Cov kav dej tooj liab tsis muaj ntau yam kev hloov kho, cov khoom siv ntxiv, cov khoom siv ntxiv thiab lwm yam tshuaj lom neeg ntawm cov kav dej yas.
Kev tshawb fawb txog keeb kwm qhia tau hais tias: E. coli nyob rau hauv cov dej tsis tuaj yeem txuas ntxiv mus txuas ntxiv hauv cov kav dej tooj liab; ntau tshaj 99% ntawm cov kab mob hauv dej rau hauv cov kav dej tooj liab 5 teev tom qab raug tua tag.
Copper yeeb nkab koom haum yog heev ntom, nrog impermeability. Txawm hais tias nws yog roj, kab mob, kab mob, oxygen thiab ultraviolet lub teeb thiab lwm yam teeb meem tsis tuaj yeem dhau los ntawm nws thiab paug dej.
Tsis tas li ntawd, cov yeeb nkab tooj liab tsis muaj cov tshuaj ntxiv thiab yuav tsis hlawv kom tso cov pa phem rau cov neeg ua pa. Kev rov ua dua ntawm tooj liab yog qhov tsim nyog rau kev tiv thaiv ib puag ncig thiab yog cov khoom siv ntsuab rau kev tsim kho kom ruaj khov.
Txawm koj xav taucov kav dej tooj liab, tooj liab rods ,tooj liab daim hlau, peb muaj cov khoom thiab kev txawj ntse kom tau raws li koj xav tau.
