Item name:Single worm gearbox with lock(lock worm gearbox, lock gearbox) No.: QDX3 This gearbox is 90degree revolving driver s Item name:Single worm gearbox with lock(lock worm gearbox, lock gearbox)No.: QDX3This gearbox is 90degree revolving driver setting, it is suitable for ball valve , butterfly valve, plug valve and other valves, and this gearbox is with lock , it can prevent somebody open ...
