曰本无码人妻丰满熟妇啪啪-淫浪奸荡乱淫影片/视频-99九九视频免费观看-久久久久久91久久久久

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