1. Ibishushanyo bitandukanye birashobora kwiganwa uko bishakiye, hamwe nibara ryiza, rikoreshwa nka veneer kubiti bitandukanye bishingiye ku biti hamwe nimbaho, hamwe nuburemere bukabije, kwambara birwanya no kurwanya ubushyuhe bwiza.2. Kurwanya imiti ni rusange, kandi birashobora kurwanya gukuramo aside isanzwe, alkalis, amavuta, alcool a ...
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