Kev tshuaj xyuas ua ntej SMT Reflow Soldering Kev kub ceev SMT tshuab SMT ntau lawm kab SMT Vuam Ntau Lawm Kab Solder Paste tshuab luam ntawv Cua sov Reflow Khoom Kev sib dhos kab cov khoom siv checkout Tee Detection Area Qhov ntsuas kub siab thiab qis qis Vibration Detection Area Product Aging Area