⑴ Weld tsis muaj zog, desoldering, txias folding;
Yog vim li cas: Lub zog tso zis thiab lub siab me me dhau.
Kev daws: 1 kho lub zog; 2 kho lub zog extrusion.

⑵ Muaj ripples ntawm ob sab ntawm lub vuam;
Yog vim li cas: Lub kaum sab xis qhib loj heev.
Kev daws: 1 kho txoj hauj lwm ntawm cov ntawv qhia cov menyuam; 2 kho cov khoom khoov seem; 3 nce qhov vuam ceev.

⑶ Lub vuam muaj qhov tob thiab pinholes;
Yog vim li cas: Overburning tshwm sim.
Kev daws: 1 kho txoj hauj lwm ntawm cov ntawv qhia cov menyuam thiab nce lub kaum sab xis qhib; 2 kho lub zog; 3 nce qhov vuam ceev.

⑷ Weld burr siab dhau lawm;
Yog vim li cas: Lub tshav kub cuam tshuam cheeb tsam yog dav dhau.
Kev daws: 1 nce qhov vuam ceev; 2 kho lub zog.

⑸ Slag suav nrog;
Yog vim li cas: Lub zog input loj dhau lawm thiab qhov vuam ceev qeeb dhau.
Kev daws: 1 kho lub zog; 2 nce vuam ceev.

⑹ Sab nrauv tawg hauv qhov vuam;
Yog vim li cas: qhov zoo ntawm lub hauv paus hlau tsis zoo; nws yog raug rau lub zog squeezing ntau dhau.
Kev daws: 1 lav cov khoom siv; 2 kho lub zog extrusion.

⑺ Kev vuam tsis raug, lap vuam
Yog vim li cas: Tsis zoo molding raug.
Kev daws: Kho qhov tsim pwm yob ntawm chav tsev.