... servo /Yuken valve 3) Man-machine dialogue type operation 4)Double head Hydrulic double head pipe bending mchine(can rotary 90deg inner ... tube material: carbons steel, mild steel, soft steel, stainless steel, aluminum, alloy, copper, brass etc. 2, Applicable tube type: Hollow square ... , etc. Inquiries are welcome at any time. Double head profile bending machine