| 摘要 |
A tray for receiving, positioning and holding variously sized x-ray film cassettes in a substantially fixed position has substantially fixed dimensions and no adjustable parts. The tray includes a plurality of tiers, each tier having a fixed side support wall and a fixed base support ledge. The walls and ledges define corner blocks which cooperate with the edges of a film cassette to prevent both vertical and horizontal movement of the cassette.
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