sound transmission material
sound transmission material
传声材料
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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In this paper, infrared wireless communication is generally described. The problem wanted to pay attention to and the material of the infrared sound transmission system is presented.
本文描叙了红外无线通讯，并提出了红外传输系统设计中应注意的问题。
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