DIN2391黑色磷化精密液压钢管主要特点:精度高、光洁度好,热处理后钢管内外壁无氧化层,内壁清洁度好,钢管承受高压,冷弯不变形,扩口、压扁无裂缝,能作各种复杂变形及机械加工处理。钢管颜色:浅灰带白。· Delivery status: NBK (bright anaerobic normalizing)· Length: 5800mm, 6000mm.Packing: wooden packin