以下为句子列表：
英文: Abstract: It is the first time to use powder damping technique in reducing the vibration and noise of cold saw clamp.Through measurement and analysls of the noise reduction effects and frequency spectrum, it is found that powder damping is a simple and pr
中文: 文摘:把粉体阻尼技术首次用于冷锯机夹盘的减振降噪，通过对其降噪效果及频谱的测量分析，发现粉体阻尼不但是一种简单实用的技术而且对夹盘的强度和固有特性影响小。
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英文: According to the characteristics of the noise source, noise reduction structure was designed in outlet and inlet of cooling system respectively, it turned out spreader noise is decreased obviously.
中文: 针对这些噪声源的特性采取相应的降噪措施，在进、排风口分别设计了消声结构，使摊铺机噪声明显降低。
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英文: Adopt and thicken sills, 1.5 times thicker than the ordinary floor, foot sense is better; the fibrous structure of wood with thick bionic sill is close to the log, the noise reduction result is better.
中文: 采用加厚基材，比普通地板厚1.5倍，脚感更好；加厚仿生基材的木纤维结构接近原木，降噪效果更佳。
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英文: Adopt and thicken sills, 1.5 times thicker than the ordinary floor, foot sense is better; the fibrous structure of wood with thick bionic sill is close to the log, the noise reduction result is better;Environmental protection is healthy; ensure the enviro
中文: 采用加厚基材，比普通地板厚1.5倍，脚感更好；加厚仿生基材的木纤维结构接近原木，降噪效果更佳；环保健康，保障生活环境安全健康；游离甲醛达市放量达到欧洲EN13329最高标准。
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英文: And the acoustical feedback of the secondary source is one of the key problems that affect noise reduction in ducts.
中文: 而次源声反馈问题一直是影响管道有源消声系统的关键问题之一。
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