Zirconium core, siv rau tundish nozzle.
Cov yam ntxwv tseem ceeb:
1. Zoo corrosion kuj, tsis pom tseeb txoj kab uas hla expansion, ntev kev pab cuam lub neej, tsis muaj deviation flow, dispersion tshwm sim;
2. thermal shock kev ua tau zoo, kev ua haujlwm tiv thaiv tawg tau zoo heev;