Yuav Qhia Li Cas Lub Zog Ntawm Txoj Kev Siv Heev?

Ua ntej, qhov tseem ceeb tshaj plaws yog saib ntawm nws cov khoom yog ib txoj hauv kev zoo li no: cov khoom siv tooj yog kim tshaj plaws, ruaj thiab tsis ploj, tsis yooj yim rau kev hloov pauv, thiab tom qab ntawd yog cov khoom siv hlau, ces qhov kev nkeeg nkees, uas yog cov khoom yas yog qhov phem tshaj.

Qhov thib ob, ua tib zoo saib qhov ntsuas qhov hnyav npaum li cas yog qhov teeb meem feem ntau, ces cov khoom siv raws li cov khoom tsis zoo, hnyav dua qhov phaus zoo. Piv txwv, feem coob ntawm cov tub rog siv txoj hlua khau siv yog ua los ntawm zinc alloy luj, kev ntxhib los mos.

Qhov thib peb, saib cov kev kho cov dej ntws tsis muaj plating, lwm qhov tau kho cov dej, yog cov npluag qhov nqaij, khaus, hlwv, pitting, xim tsis ncaj, daj thiab yog li ntawd, yog qhov khoom phem .