关于scourings的百科

• scourings造句怎么写

• "Sewagesludge"meanssludgearisingfromurbaneffluenttreatmentplantandincludespretreatmentwaste,scouringsandunstabilisedsludge.Forthepurposesofheading38.25,"sewagesludge"meanssludgearisingfromurbaneffluenttreatmentplantandincludespretreatmentwaste,sc...
• 2017-07-2922557