Karl Connell
Major Karl Connell (1878-1941) was an American surgeon, serviceman and inventor. Connell Mask, Connell Model, Connell Flowmeter, Connell Airway
Tag Gas mask
Major Karl Connell (1878-1941) was an American surgeon, serviceman and inventor. Connell Mask, Connell Model, Connell Flowmeter, Connell Airway