尤物久久久久国产综合精品_日韩国产日韩欧美_饥渴难耐的浪荡艳妇在线观看_男女激情国产免费网站欧美视频_免费人成观看在线网_动漫人物拔萝卜打扑克免费_影音先锋 欧美精品_亚洲AV永久无码精品一区_无码人AⅤ一二三区_亚州AV无码专区在线电影

Products Home>Products

Special Spring System

●Each roller blind has its own spring system.
●we have slow rise spring,and safety spring for the motor system
●high quality steel, steel wire for flat design or circular design, can maintain lasting tension
●fit with our 15mm~35mm aluminum tube