Abstract: A method of manufacturing a battery is disclosed. The battery includes an electrode assembly including a positive electrode and a negative electrode, an electrolyte solution, and a battery case enclosing the electrode assembly and the electrolyte solution. The method includes an electrolyte filling step of filling the electrolyte solution into the battery case enclosing the electrode assembly, an X-ray applying step of applying X-rays to the battery case enclosing the electrode assembly and the electrolyte solution, and a checking step of checking a permeation state of the electrolyte solution in the electrode assembly based on an image obtained in the X-ray applying step. In the X-ray applying step, the tube current of an X-ray generator is higher than or equal to 100 ?A and lower than or equal to 10000 ?A.

Abstract: A pulse air jet generator being used for an air shower apparatus. An air flow restricting member, which is so configured as to cross an air flow blown off from an air blowoff nozzle intermittently at part of the rotational locus thereof and to rotate by the air flow, is provided on the air blowoff side of the air blowoff nozzle, and the weight of a rotating portion including the air flow restricting member is unbalanced so that the air flow restricting member is reset to a position corresponding to that of the air blowoff nozzle by the dead weight when the air blowoff is stopped. The air blowoff nozzle is disposed in an annular frame fixed on an air blowoff portion at a position shifted to the outer peripheral side from the center of the annular frame, the rotational center of the air flow restricting member is positioned at the center of the annular frame.