Dab tsi yog qhov txhuas extrusion?
Aluminium extrusion txhais tias yog txheej txheem ntawm shaping khoom, piv txwv li, txhuas,
nws yog los ntawm nws mus ntws los ntawm ib tug zoo li nyob hauv ib tug tuag,
thiab extrusion khoom emerges raws li ib tug elongated piece nrog tib profile raws li cov tuag qhib.
uas yog hu ua txhuas extrusion txhais,
