防焊油墨

solder mask (applied to a circuit board)

oil / fat / grease / petroleum / to apply tung oil, paint or varnish / oily / greasy / glib / cunning

to protect / to defend / to guard against / to prevent

surname Mo / abbr. for 墨西哥[Mo4 xi1 ge1], Mexico

ink stick / China ink / CL:塊|块[kuai4] / corporal punishment consisting of tattooing characters on the victim's forehead

to weld / to solder

variant of 焊[han4]

variant of 焊[han4]

printing ink