Cov thoob dej yas feem ntau siv los khaws cov kua hauv cov ntawv thov kev lag luam. Lub sijhawm no, xyuam xim rau qhov kub thiab txias ntawm qhov chaw cia, vim tias qhov kub dhau dhau lawm, nws yog ib qho yooj yim uas ua rau cov khoom xyaw yas ua kom sib xyaw rau hauv dej; thiab txawm hais tias peb lub thoob yas muaj qhov zoo, tab sis kuj tseem tuaj yeem tiv tsis taus kev sib tsoo, tshwj xeeb tshaj yog thaum thauj cov phom sij hauv cov yas yas, lawv yuav tsum ua nrog kev saib xyuas. Nws yog tseeb vim tias Linyi yas nruas muaj cov yam ntxwv zoo heev rau kev ntim cov khoom txaus ntshai. Xeb, thiab tej yam cuam tshuam thaum lub sijhawm siv, kev txhim kho corrosion yog qhov zoo heev, tuaj yeem xyuas kom cov kab lus tsis zoo, yog li nws yuav siv ntau zaus hauv kev siv.
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