by Jan Willem Bech | Database OX GER
de Dräger Misch Gas Gerät DM20 und DM40 In 1909, Dräger developed a series of hoseless helmet diving systems known as the Gurtel Taucher Apparat the DM20 and the DM40 diving apparatus. The Gürtel Taucher Apparat is described here. The DM20 is a system intended for...
