Detachable diver{40 s weight
作者： Schescke W , Johnston B
DOI:
关键词:
摘要: A diver's weight is formed with a belt-gripping spring clip for easy attachment to and detachment from belt without loosening or removing the body.
lens.org 参考文章(2)
Earl J Clark, Inside gun holster ,(1964)
Thomas J Flanagan, Belt clip attachment for camera ,(1963)