... customers 2.Working speed :6m-8m/min flexible duct connector machine The machine is composed by two lines at ... , TDF hydraulic folder, auto cutting to length line, pipe bending machine , FN seam welder,notching and shearing machine ... 57841819Tel:+86-21-57842040Phone:+86-13817091187 flexible duct connector machine,soft connector duct/pipe,tube connector machine,round duct connector,duct connector maker