夫琅和费材料力学研究所的研究员正在为此寻找合适的透明材料。
Researchers at the Fraunhofer Institute for Mechanics of materials are looking for suitable transparent materials to make them.
夫琅和费材料力学研究所的研究员正在为此寻找合适的透明材料。
Researchers at the Fraunhofer Institute for Mechanics of materials are looking for suitable transparent materials to make them.
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