Ua ntej, cov khoom siv dab tsi yog pp hollow phaj Nws yog ib hom phaj ua los ntawm polypropylene raws li raw cov ntaub ntawv, qhov cross-section ntawm no hom phaj yog lattice, nws cov xim yog nplua nuj thiab ntau haiv neeg, tab sis kuj muaj kev tiv thaiv ib puag ncig thiab ruaj, noo noo- pov thawj thiab waterproof, anti ...
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