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覆盖带过滤器的通风孔。
Cover air vents with filters.
youdao
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这些暗室通风孔在新老建筑中安装都很简单。
These darkroom vents are easy to install in both old and new construction.
youdao
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这些暗室通风孔在新老建筑中安装都很简单。
These darkroom vents are easy to install in both old and new construction.
youdao