![Can someone explain the air filtering unit for me please? I dropped 400k on these filters and they had a 5 minute timer and disappear? (I had one in the first slot Can someone explain the air filtering unit for me please? I dropped 400k on these filters and they had a 5 minute timer and disappear? (I had one in the first slot](https://i.redd.it/zf1auxagd4d61.png)
Can someone explain the air filtering unit for me please? I dropped 400k on these filters and they had a 5 minute timer and disappear? (I had one in the first slot
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Generation of highly integrated multiple vivid colours using a three-dimensional broadband perfect absorber | Scientific Reports
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