Connectedbya thickness of 0.5-1.2MMCLILhot dip galvanizedmetal,miningautomationmachinery willrollinto a spiral,andthematerialofthefixeddistanceoverlap,theductlight, thin, high strengthof thespiralductwithinaductspiraloverlapstructure,increase theductstrength and toughness, air tightness andgoodwind speedstrongfrictionloss