I . Duct is built of the alu lamied with the polyester .It was designed especially for the needso fthe ventination air and air conditioning market .
II. It has the advance of no need to usee special tools for cutting or fixing . It doesn emit toxic gases in the high temperatures . It is fire resistance .
Ⅲ. Machine is composed of wire decoiler , heating oven ，main machine , auto cutting ,run off table with pipe compressing .