What with the appropriate suction tube Dichotomanthes tube and rubber machine
The bellows are extruded by the extruder, and the winding tubes are wound in circles
The spiral tube called spiral steel tube or spiral welded pipe, the low carbon steel or low alloy structural steel strips in a helical line certain angle (called forming angle) rolled into a tube, then the tube welding seam made up, it can be used in narrow strip production of large diameter steel pipe spiral pipe is mainly used in oil.
