Cov ntxaij vab tshaus polyurethane feem ntau suav nrog polyurethane mine cov ntxaij vab tshaus thiab cov ntxaij vab tshaus polyurethane lub cev qhuav dej.Polyurethane tshuaj ntsuam daim hlau yog siv rau hauv metallurgy (hlau ore, limestone, fluorite, txias moj tej tawg rauv slag, coke thiab lwm yam raw khoom), non-ferrous hlau, thee, tshuaj, tsev lev ...
Nyeem ntxiv