| 摘要 |
The sheets ( 1 ) and ( 2 ) are cut separately in rectangular shapes and with one of their corners recessed ( 1.2 ) and ( 2.4 ) and the sheet ( 1 ) slightly larger than the other one, double, on layer ( 2.1 ) an alignment of cylindrical lenses ( 2.2 ) which reflect images from the other internal sub-sheet ( 2.3 ), the two sheets ( 1 ) and ( 2 ) are superimposed; they are joined and their rims hooked together, in a tube ( 3 ) with the vertical upper recesses; a small flange ( 1.3 ) is configured at the top covering the rim of the sheet ( 2 ), except for the recess thereof, with one of the ends of the small flange ( 1.3 ) overlapping the other; the lip ( 1.4 ) is inserted in the stepped piece ( 4.1 ) of the bottom ( 4 ) of the container; the latter is flanged ( 4.2 ).
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