Thaum nws los txog rau ntawm kev muaj cov ntawv pov thawj uas yog corrugated, ntau tus neeg yuav xav txog cov ntawv pov tseg corrugated. Qhov tseeb, qhov tshwm sim no tsis zoo ib yam li inverted. Nws raug nquahu kom tshawb xyuas los ntawm ntau qhov chaw xws li cov khoom siv raw, cov tshuab ib leeg pob zeb, flyovers, pasting machine, conveyor siv tawv, p ...
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