Chimiro chikuru chepombi yekongiri ine corrugated culvert uye mamiriro anoshanda (1) Yakatenderera: chimiro chenguva dzose chepombi, chinoshandiswa zvakanaka mumamiriro ese ekushanda, kunyanya kana kudzika kwenzvimbo yekuviga kwakakura. (2) Yakatenderera yakatwasuka: kalvert, pombi yemvura yemvura, sewer, chan...
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