| 2. | It is made of high quality aluminium alloy section , convenient on adjusting torque of roller , equipped with unique self - locking device , large rolling picture , suitable for long and thick fabric picture 优质铝合金材质,可方便调节滚筒的扭力,具有独特的自锁装,收卷画面空间大,更适用长、厚材质画面展示。 |