Modified Beaver
1,476 مرتبہ دیکھا گیا
ویڈیو کی تفصیل
To clean the rivers and the canal we use our modified beaver : it collects both organic and synthetic materials. Dispersion is pollution, concentration accelerates bio-degradation. Animals are just amazing.
پر شامل کیا گیا
13 جنوری 2017
تبصرے
