Se emplea un sistema móvil de coord

Se emplea un sistema móvil de coordenadas que tiene centro en M y ejes según la tangente y la normal al camino en este punto.

Kết quả (Anh) 1:

used a mobile system of coordinates is in my center axis along the tangent and normal to the path at this point.

Kết quả (Anh) 2:

It employs a system of coordinates that mobile has center in M and axs as the tangent and normal to the path at this point.