... . 2.15-roller six re-type straightening machine Brief Introductiona) Length ways: directly input the length of sheet metal at operating table ... .b) Horizontal shears: adopt machinery pneumatic clutch style, cut from the bottom to up, bottom cutting is "V-type" bottom knife, up ... , after welding, all adopt large scale furnace tempering, it could make a clean sweep of internal stress, so rigid is good ...