Factory ncaj qha khoom muaj thav duab siab zog khoom steel placon tiaj tus menyuam taug kev sib koom ua ke rau hom 60 cov menyuam khiav.
Peb yog cov chaw tsim khoom ntawm steel roller taug kev sib koom ua ke. Peb cov khoom raug muag ncaj qha los ntawm cov chaw tsim khoom. Nrog tus nqi qis thiab kev xa khoom loj, peb yog qhov kev xaiv zoo tshaj plaws rau cov neeg muag khoom.