Ko te takenga mai o te bentonite "whenua ao" Ko te Bentonite he paru kohuke motuhake me te viscosity, te roha, te whakahinuhinu, te whakauru wai me te thixotropy me etahi atu ahuatanga, kua hipokina e te whakamahinga nga rauemi whakarewa, pire whakarewa, paninga matū, paru keri me te ahumahi marama ...
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