Kev faib tawm ntawm ED tooj liab ntawv ci: 1. Raws li kev ua tau zoo, ED tooj liab ntawv ci tuaj yeem muab faib ua plaub hom: STD, HD, HTE thiab ANN 2. Raws li cov ntsiab lus saum npoo, ED tooj liab ntawv ci tuaj yeem muab faib ua plaub hom: tsis muaj nto kev kho mob thiab tsis tiv thaiv xeb, nto kho los tiv thaiv corrosion, ...
Nyeem ntxiv