Abstract: A floating body type offshore wind power generation is provided. An elongated floating body is provided with a sail and a rudder, and a wind-power generator and a battery are provided on the floating body. These are provided with a GPS and a communication facility, and are capable of determining and moving to places having good wind conditions. The floating body can travel in both directions in a longitudinal direction and can travel also to the windward, and is capable of staying at substantially the same position by repeating the movement in a switchback manner, so that the same function as a moored floating body type wind power generation is also achieved. Generated power is accumulated in the battery or the like and the power is extracted on a site of use such as the land for use.

Abstract: An automatic soldering mechanism is for jetting a solder jet flow to a printed-circuit board to carry out a soldering of the printed-circuit board. The automatic soldering mechanism comprises a solder tank for storing a molten solder and a solder jetting nozzle section for jetting the solder jet flow higher than a melt surface of the molten solder within the solder tank in an inert gas atmosphere.

Abstract: A mechanism for forming a liquid-tight seal around the rotary shaft of a liquid pump having a stationary ring attached to the casing of the pump and a rotating ring attached to the rotary shaft and contacting the stationary ring. The stationary ring is formed from baked carbon, while the rotating ring is a sintered product of silicon nitride. The stationary ring has an effective seal width ratio, rp/Di, of 0.07/1 to 0.22/1, where rp is the width of the effective seal surface of the stationary ring and Di is its inside diameter.