Heat exchanger useful in district heating power station to exchange heat between a hot exhaust gas flow and a cooling medium, comprises a first pipe for flowing the hot exhaust gas flow, and a second pipe for flowing the cooling medium
DE102004012303B3
Reaction cell for photo-electrochemical generation of hydrogen, useful particularly in conjunction with fuel cells, has two electrodes, in facial contact, and light source for irradiating the electrodes
DE3837480A1
Rolling pedestal for containers, e.g. beer crates, water crates and other containers (crates, cardboard boxes, canisters)
DE3824317A1
Rotatably mounted, hand-operated or motor-operated sieve drum for soils, composts, sand, building materials and the like
