| 摘要 |
1467359 Releasable fastening G FRANK 22 May 1974 [1 June 1973] 22986/74 Heading E2B A fastener comprises a stiffly rotatable stud 4 having a head 7 and a flattened shank 9 which enters a slot 10 and is turned 90‹ to retain it in space 11. Units I and 2 may be mutually rotated bodily.
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