Plastic drainage osisi
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Plastic Drainage Board
A na-eji polystyrene (HIPS) ma ọ bụ polyethylene (HDPE) mee mbadamba mmiri mmiri dị ka ihe akụrụngwa. N'ime usoro mmepụta ihe, a na-agbanye mpempe akwụkwọ plastik iji mepụta ikpo okwu oghere. N'ụzọ dị otú a, a na-eme mbadamba mmiri mmiri.
A na-akpọkwa ya concave-convex drainage plate, nchekwa nchekwa mmiri, ebe a na-adọba ụgbọala na-adọba ụgbọala, efere mmiri mmiri, wdg. A na-ejikarị ya eme ihe maka mmiri mmiri na nchekwa nke oyi akwa mkpuchi n'elu ụlọ ụgbọala. Ya mere, dị ka iji hụ na ngafe mmiri n'elu ụlọ nke ụgbọala nwere ike atara mgbe backfilling. Enwere ike iji ya maka mmiri mmiri ọwara.