Cov txheej txheem ua cov paib feem ntau muab faib ua stamping, tuag-casting, hydraulic, corrosion, thiab lwm yam, ntawm cov stamping thiab tuag-casting yog ntau dua.Kev kho xim Cov txheej txheem xim yog muab faib ua enamel (cloisonne), imitation enamel, ci kua roj vanish, kua nplaum, luam ntawv, thiab lwm yam Cov ntaub ntawv ...
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