Lub ntsiab nta:
Tsis lo, Kub tsis kam, Tsis tshua muaj kub tsis kam, Corrosion tsis kam, Lub zog zawv zawg, tsis kam, tsis kam tiv taus kub, rwb thaiv tsev, atmospheric laus tsis kam, permeability tsis kam, lub cev muaj zog, tsis muaj tshuaj lom.
Cov ntawv tseem ceeb:
Lub hnab plua plav, lub hnab lim, Kub tiv taus lim tshuaj ntsuam, daim ntaub, Anti-corrosion net / txoj siv, Tshav kub / lub tsev pheebsuab, Lub siab kub tiv thaiv cov tes tsho, Cov khoom cua kub-tiv thaiv sheath, Kub qhov kub tsis muaj hnab riam, Muaj qhov kub tsis ruaj lub taub, kub yeeb nkab sheath.
