Ko te kumete whakamaroke-whakaranu he whakakotahitanga o nga rawa cimentitious (sima, pungarehu rere, paura para, me etahi atu), nga kohinga pai kua tohua (kirikiri kiripaka, corundum, me etahi atu, me etahi wa ka hiahiatia he Granules marama, perlite kua whakawhānuihia, vermiculite kua whakawhānuihia, etc. ) me nga mea whakauru ka whakakotahi i roto i tetahi waahanga...
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