Akụkọ ụlọ ọrụ

Dị ka anyị niile maara, galvanized ígwè grating bụ nnọọ vasatail ígwè ngwaahịa, o nwere isiike Ọdịdị, ike mgbochi corrosive ike mgbe nwere ike inye ezi ventilashion n'otu oge otú ọtụtụ ebe na ọtụtụ ubi. Mana n'ahịa nke ngwaahịa ...