| 摘要 |
The innovation includes a sign arrangement existing of two with each other concurrent parts, one the first, one outer, part (10) adjust to cover a second. One inside, part (20), which the first part is adjusted to take a transparent Plate for one in parts cover orientation know exposure to second parts apply Sign related message. Named two parts (10, 20), in the named parts cover orientation are so co-ordinated that the second, the inside, part (20) can allow, by an organ of drift (15), a moving rotation relative the first, the outer, part (10) and the named second part (20), by a second part raising and following means (14) are arranged to know falling and raising vertical relativity named the first part (10).
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