Abstract: The invention relates to a submersible power plan. The submersible power plant is submerged in a fluid. The power plant includes a structure and a vehicle where the vehicle has at least one wing. The vehicle is arranged to be secured to the structure by at least one tether. The vehicle is arranged to move in a predetermined trajectory by a fluid stream passing the vehicle. The tether includes an upper tether part and a lower tether part. The upper tether part has an average density higher than the fluid, has a hydrodynamic cross section and is arranged to be connected to the vehicle. The lower tether part has an average density lower than the fluid, has a non-hydrodynamic cross section and is arranged to be connected to the structure.

Abstract: A powder pressing device includes a die having an inner space forming a pressing region in which powder pressing takes place, and upper and lower plungers moveable into and out of the inner space of the die. The die has an ejecting region possessing an inlet proximal to the pressing region and an outlet distal from the pressing region. The dimension of the die gradually decreases in the ejecting region of the die in a direction from its inlet to its outlet.