| 摘要 |
A covering ( 10 ), for an access aperture, comprises a pair ( 11, 12 ) of cover plates, of unequal sizes, that are positionable one adjacent the other along a line of juxtaposition ( 14 ) to define a generally rectangular covering. The line of juxtaposition ( 14 ) extends from one side ( 24 ) of the generally rectangular covering to another ( 26 ) and is spaced from the diagonal ( 27 ) of the rectangular covering that it is proximate.
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