Kuva mu myaka ya za 1950, abajenjeri bakoze neza hamwe na geomembranes.Ikoreshwa rya geomembranes, nanone ryitwa imiterere yoroheje ya membrane (FMLs), ryiyongereye bitewe n’impungenge zatewe no kwanduza umutungo w’amazi.Imirongo gakondo ya porous, nka beto, admi ...
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