国产精品无码一区二区三区在,无尺码精品日本欧美,久久这里精品国产99丫e6,亚洲国产日韩精品一区二区三区

1. The frames width of this series of is 82mm, which is called as 82 series single vertical sliding window;
2. It adopts American PU injection insulation profiles with high strength;
3. The window features exquisite facade, and reasonable opening and ventilating modes;
4. The window has superior air tightness and water tightness;
5. The window structure is safe and does not occupy space.
6. This window can save the manufacturing materials.