Using sliding hold top-hung outward window can easily control can be ventilation, casement fixed in the position you want.
采用滑撑的上悬外开窗能轻松控制通风量，可将窗扇固定在您想要的位置。
Using sliding hold top-hung outward window can easily control can be ventilation, casement fixed in the position you want.
采用滑撑的上悬外开窗能轻松控制通风量，可将窗扇固定在您想要的位置。
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