Cov txheej txheem ntau lawm feem ntau muab faib ua stamping, tuag-casting, hydraulic siab, corrosion, thiab lwm yam. Ntawm lawv, stamping thiab tuag-casting yog ntau dua. Kev kho xim thiab xim txheej txheem muaj xws li enamel (cloisonné), imitation enamel, ci xim, kua nplaum, luam ntawv, thiab lwm yam.
Nyeem ntxiv