Txhawm rau txiav txim siab seb cov kabmob tshem tawm tuaj yeem rov qab siv tau, tom qab ntxuav, peb yuav tsum ua tib zoo xyuas qhov chaw sib tw, dov nto thiab hnav qauv ntawm cov kabmob tawb.Yog tias cov kabmob muaj qhov tsis xws luag hauv qab no, nws siv tsis tau lawm.
1.Txhua yam ntawm lub nplhaib tawm, lub nplhaib puab, dov lub caij thiab lub tawb muaj tawg lossis thais.
2.Nws muaj qhov pom tseeb qhov nqaij tawv los yog xeb ntawm qhov chaw sib tw, cov kabmob rib, lossis cov khoom dov.
3.Lub tawb bearing muaj observably puas los yog lub rivet yog flabby.
4.Qhov saum npoo ntawm lub puab txoj kab uas hla ntawm lub khob hliav qab thiab txheej kab ntawm lub khob muaj pom tseeb creep.
5.Qhov pom tseeb discoloration tshwm sim los ntawm tshav kub.
Post lub sij hawm: Jan-13-2022