It is used as a window for breeding cow building and for wind-up of light shielding film for ventilation
On 2016-04-29 21:26:03
I installed it immediately after goods arrival. Installation was very easy and could be installed easily. Working feeling can be rolled up, rewinding can be done with very smooth and light power. The barn length is 18 meters and the window for ventilation is covered with a piece of light shielding film so it was heavy work for winding up, but it was a great job to set up after a long time.