亚洲国产成人精品女人久久久_欧美成人精品高清在线观看_亚洲熟妇AV日韩熟妇在线_少妇精品无码一区二区三区,最新免费国产无码_久久精品综合精品_国内精品久久久久国产_无码专区一va亚洲天堂,91人妻人人澡人人爽人人精品 ,一级特黄AAA大片在线观看_国产一级a毛一级a看免费视频_一级a性色生活片久久无少妇一级婬片免费放_免费无码婬片AAAA片直播_真人一级毛片_久久久久国产一区二区三区_寡妇高潮一级毛片91免费看｀日韩一区二区 ,国产乱人伦真实精品视频_免费无码成人äV在线播放不卡_äv色综合久久天堂äv色综合在线_国产成人综合色视频精品_亚洲vä国产日韩欧美精品

BA series valve manual device, is a multi-turn valve actuators. It is suitable for gate valves, globe valves and other types of valves. Stem nut thread forms and sizes are usually processed by the user depending on their own with the valve. High transmission efficiency, easy to install