<iframe src="https://mediatheque.univ-reims.fr/video/0844-ue-med0302-ultrasons-milieu-de-propagation/?is_iframe=true" width="640" height="360" style="padding: 0; margin: 0; border:0" allowfullscreen loading='lazy'></iframe> Médiathèque Reims https://mediatheque.univ-reims.fr/videos/?owner=bomers01 360 https://mediatheque.univ-reims.fr video 640 1.0 THOMAS BOMERSBACH https:/media/cache/85/22/8522291f36b5185e60ed221d481bb18d.png 640 360