ดูวิดีโอฟรี The Problem With Big Grass Cutter Machines
คำอธิบายแอนิเมชัน:
The struggle that man went through just to cross the machine up two stair steps, he could have cut the grasses manually with the lost energy.
The struggle that man went through just to cross the machine up two stair steps, he could have cut the grasses manually with the lost energy.