content: They are deliberately withholding .... https://www.3dprintingmedia.network/covid-19-3d-printed-valve-for-reanimation-device/  Cristian Percassi explains (in Italian) why the STL file has not been shared at this time. The first key reason is – for the time being – only one hospital had a requirement for about 100 venturi valves and the requirement was fully satisfied with the first production batch. Another hospital may now have a similar need and many hospitals around the world may follow.   Bad move, they need to publish before they are hit with a court order.