Caij nplooj ntoos hlav compression sib tsoo taub hau
Lus Cim: Txhua RUNTO gravure Sib Tsoo tshuab muaj qhov sib tsoo lub taub hau thiab sib tsoo log thav ntawv.
Peb yog cov chaw tsim khoom ntawm gravure phaj ua khoom siv. Peb cov khoom tau raug muag rau cov neeg siv khoom hauv tsev thiab txawv teb chaws thiab tau txais kev pom zoo thiab qhuas.