Explicación de los Sistemas:
httpv://www.youtube.com/watch?v=DXLrg8oTDhQ&feature=channel_video_title
httpv://www.youtube.com/watch?v=FcMtALMkrvM&feature=channel_video_title
httpv://www.youtube.com/watch?v=xII0EtQ8GsM&feature=channel_video_title
Tocando…
httpv://www.youtube.com/watch?v=gj7_iXtxFBo&feature=channel_video_title
httpv://www.youtube.com/watch?v=vrqxED8a0FE&feature=channel_video_title