How is the flexible casing of the fire pond connected to the tube?
EPS expansion polystyrene board: is a volatile liquid blowing agent containing polystyrene (eps) beads, preheated by heating after the mold in the mold, with fine closed-cell structure characteristics
Composite tube: in a tube of the tube with more than two electrode system, each electrode system independently through the electronic flow, to achieve their own functions, this tube is called composite pipe
