A magnetic memory device in which the memory cell of MRAM is reduced in size, and a method for producing the magnetic memory device are provided. The flow measuring system includes a gas volume fraction meter in combination with a coriolis meter. Instead, the technique employs a composition function that regenerates the secured object when one inputs a valid password. The blade locator may include a protrusion for inserting into the hole or receiver of the blade. The valve is movable vertically under water pressure between an upper position wherein water flows through the cap portion side orifice, the bore and through the body vertical pipe, and a lower position where water flows around the cap portion through the internal partition water passages.