tshem tawm cov khoom tsis tseem ceeb
Thaum pom cov pa phem loj dua xws li nplooj, ntawv, thiab cov luam yeeb ntawm cov nyom, lawv yuav tsum tau ntxuav kom huv si raws sijhawm. Koj tuaj yeem siv lub tshuab cua kom yooj yim los ntxuav lawv sai sai. Tsis tas li ntawd, cov npoo thiab thaj chaw sab nraud ntawmcov nyom dagyuav tsum tau kuaj xyuas tsis tu ncua kom tiv thaiv kev loj hlob ntawm cov moss. Thaum pom cov cim ntawm kev loj hlob ntawm cov nroj tsuag, siv cov yeeb nkab siab kom tshem tawm lawv.
Tshem tawm cov khoom ntse
Rau cov nyom dag, cov pa phem tshaj plaws yog cov khoom ntse, xws li pob zeb, iav tawg, cov khoom hlau, thiab lwm yam. Cov pa phem no yuav tsum tau muab tshem tawm tam sim ntawd. Tsis tas li ntawd, cov khoom qab zib thiab cov nplaum kuj ua rau muaj kev phom sij heev raucov nyom dagthiab tuaj yeem kho nrog cov txheej txheem txias.
Tshem tawm cov xim av
Feem ntau hais lus, kev ntxuav niaj hnub tuaj yeem tshem tawm feem ntau cov xim av. Cov xim av loj dua tuaj yeem so kom huv nrog daim ntaub ntub dej uas muaj cov roj av. Cov xim av zoo li dej xws li kua txiv hmab txiv ntoo, mis nyuj, dej khov nab kuab, thiab cov xim av ntshav tuaj yeem txhuam nrog dej xab npum ua ntej. Tom qab ntawd yaug kom huv si nrog dej; cov xim pleev khau, roj pleev thaiv hnub, roj cwj mem ballpoint, thiab lwm yam tuaj yeem so nrog daim phuam so uas ntub rau hauv perchlorethylene, thiab tom qab ntawd ziab nrog phuam so uas muaj zog nqus tau zoo; rau cov xim av xws li paraffin, asphalt thiab asphalt, tsuas yog so kom huv si lossis siv daim phuam so. Tsuas yog ntub rau hauv perchlorethylene thiab so nws; cov xim, cov txheej, thiab lwm yam tuaj yeem so nrog turpentine lossis cov tshuaj tshem xim; cov kab mob fungi lossis cov pwm tuaj yeem tshem tawm nrog 1% hydrogen peroxide dej. Tom qab so, muab lawv ntub kom huv si hauv dej kom tshem tawm lawv.
Lub sijhawm tshaj tawm: Lub Ob Hlis-26-2024
