A method 1, and wherein the fixing member comprises at least two round disks whose axial lengths are considerably less than their diameter, and positioning said disks a distance apart from each other, between the plates, and separately welding each of the disks, at their lines of contact, to {HEAD ~ each} of {TAIL ~ the plates} 
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A method 1 , and wherein the fixing member comprises at least two round disks whose axial lengths are considerably less than their diameter , and positioning said disks a distance apart from each other , between the plates , and separately welding each of the disks , at their lines of contact , to { HEAD ~ each } of { TAIL ~ the plates }
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