Non-standard galvanized ntawv
Lus piav qhia luv luv:
Galvanized ntawv yog hais txog cov hlau phaj nrog ib txheej ntawm zinc rau ntawm qhov chaw.Galvanizing yog ib qho kev lag luam thiab kev tiv thaiv xeb feem ntau siv.Txog ib nrab ntawm lub ntiaj teb zinc ntau lawm yog siv rau hauv cov txheej txheem no.
