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Permanent markings of painted surfaces visible by irradiation with UV-light
Permanent markings of painted surfaces visible by irradiation with UV-light
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机译:紫外线照射可见的油漆表面永久性标记
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摘要
the present invention relates to a permanent mark for permanent marking of painted surfaces, whereby the marking is invisible in daylight, and only by irradiation with uv light is visible.
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