The utility model which has simple structure and easy use is suitable for metal window frames and plastic window frames.

该装置结构简单、使用方便，适用于金属窗框和塑料窗框。

youdao

The utility model which has simple structure and easy use is suitable for metal window frames and plastic window frames.

该装置结构简单、使用方便，适用于金属窗框和塑料窗框。

youdao