scourings造句
"Sewagesludge"meanssludgearisingfromurbaneffluenttreatmentplantandincludespretreatmentwaste,scouringsandunstabilisedsludge.Forthepurposesofheading38.25,"sewagesludge"meanssludgearisingfromurbaneff...
"Sewagesludge"meanssludgearisingfromurbaneffluenttreatmentplantandincludespretreatmentwaste,scouringsandunstabilisedsludge.Forthepurposesofheading38.25,"sewagesludge"meanssludgearisingfromurbaneff...