Back reflection characteristics of laser were researched for the infrared camouflagecoating and the microwave absorbing coating.
研究了红外与雷达波隐身涂层的激光后向散射特性。
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If you haven't seen these nymphs before on the site, they're actually jet black: the white coating is lint and dirt that they glue to themselves with spittle to form camouflage.