... gas, fit 4 hours, 6 minutes, 1 inch different types of old and new gas pipeline valves, butterfly valves. Easy installation, ... , so that the robot can fit 4 hours, 6 minutes of different types of old and new gas valve.2.Easy installation, no need ... and reliable; sealed flame retardant shell; in particular the use of patented technology, electric, manual clutch conversion, mechanical hand power outage ...