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Toward effective membranes for hydrogen separation: Multichannel composite palladium membranes
Reversible manual variable-speed driving device and rowing-imitating hand-powered car
REVERSIBLE HUMAN-POWERED VARIABLE SPEED DRIVE DEVICE AND ROWING-IMITATING HAND-ACTUATED VEHICLE
Manual variable-speed driving device, man-powered bicycle, man-powered aircraft and man-powered ship
Fahrzeugsitz und Winkeleinstellvorrichtung für eine Rückenlehne eines solchen Fahrzeugsitzes
Automobile seat and backrest angle adjusting device thereof
Automobile seat backrest lock and automobile seat comprising same