mặt phẳng nghiêng 
inclined plane [ mặt ] : (1) right; (2) face, surface, dial; (3) side, aspect
[ phẳng ] : even, smooth, flat, level
[ nghiêng ] : to lean, tilt, slope, incline, slant
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
mặt phẳng nghiêng inclined plane