... is made up of stand, hollow spindle, solenium, spiral spring, revolving joint and ree drum.Revolving joint is the ... device between the static pipe and the hose.Spiral spring is the power source of the reel.Features:1. ... when drived by the energy stored in the spiral spring.Attention: The reel can be used with electric motor ... , machine tool, production line and other similar occasions. gas Hose Reel drum