Cov txheej txheem tsim khoom rau cov yeeb nkab fittings suav nrog forging thiab cov kev ua haujlwm. Raws li tau nias, rauj, tho, extruding, chim siab, dov, khoov, fust, fusion vuam thiab machining. Lossis cov txheej txheem ntawm kev sib xyaw ua ke ntawm ob lossis ntau dua ntawm cov haujlwm no.