Technology ntawm semi-automatic vuam nyob rau hauv gaseous ib puag ncig yog ib qho ntawm feem nrov txoj kev koom nrog hlau niaj hnub no. Cov txheej txheem no tso cai rau koj los ua cov pob qij txha zoo nrog qhov tsawg kawg nkaus ntawm kev tsis lees paub thiab kev puas tsuaj rau cov qauv sab hauv ntawm lub workpieces. Tshwj xeeb tshaj yog txaus siab yog carbon dioxide vuam, uas tshem tawm qhov xav tau ntawm flux thiab muab txawm, nruj seams