Cov txheej txheem tseem ceeb ntawm cov yeeb nkab siab: cov cua kub cua sov, perforated raj, yeeb nkab txuas ntxiv. High-pressure yeeb nkab dov, yeeb nkab sizing thiab txo, xov thiab txias yeeb nkab los yog txoj kev tsim tau hais tias Billet cua sov perforation tshav kub khi pickling txias drawn carbon burning cutti ...
Nyeem ntxiv