It's because of this, that makes them better than a conventional plastic vent or louver.
这是这个原因，这使得它比传统塑料通风孔或百叶窗更好。
AROC Series aluminum louver with outside vent control.
AROC系列铝制百叶窗，设计用于外界通风控制。
This is the Regular Series aluminum louver with an adjustable vent control added.
这是常规系列铝制百叶窗的补充，带有一个可调节排气控制盘。
This is the Regular Series aluminum louver with an adjustable vent control added.
这是常规系列铝制百叶窗的补充，带有一个可调节排气控制盘。
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