| 摘要 |
A tethered aerial top comprising a pair of circular disks each having a central hub formed with a stepped bore therethrough, a tubular shaft pressed into the larger-diameter portions of the bores and a rivet extending through the tubular shaft and having at one end a head abutting against the end face of the hub on one disk and means connected to the other end of said rivet and abutting against the end face of the hub of the other disk, to thereby securely hold the two disks in spaced and axial alignment with each other.
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