These perforated aluminum panels are not only serve as architectural elements, but also help to block the ambient noise, and allow light and air to enter without sacrificing privacy.
这些多孔铝板不仅作为建筑构件，也有助于阻挡环境噪音，在不影响隐私的情况下让光线和空气进入。
The two ends of the central shaft which serve as the rotation center of the caster wheel are mounted loosely, so as to letdown the noise of caster wheel rotation.
发明作为脚轮的旋转中心的中心轴的两端松弛的安装，以降低脚轮旋转时产生的噪音。
The two ends of the central shaft which serve as the rotation center of the caster wheel are mounted loosely, so as to letdown the noise of caster wheel rotation.
发明作为脚轮的旋转中心的中心轴的两端松弛的安装，以降低脚轮旋转时产生的噪音。
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