空气过滤器位于面板下方的连接。
在每个房间回风管的前面板上安装有一台一次性的非毛织品过滤器，以及一台板式可洗粗铝过滤器，以捕捉收集可能产生的任何粉尘。
A disposable non-woolen filter, and a panel type washable coarse aluminum filter are installed in the front panel of return air duct of each room, to trap powder generated, if any.
当我播放4个文件时，下一个序列只有一个，我不能在删除源文件过滤器后正确重新绘制视频面板。
When I am playing 4 files, then the next sequence only has one, I can't seem to repaint the video panel correctly after removing the source file filter.
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