We mainly produce cylinder, colddrawn tubes, honing tube, piston rod, and machinery manufacturing, the annual output reaches over 20,000 tons.
现主要生产油缸（ 油缸管）、 冷拔管、珩磨管、活塞杆以及机械加工制造等，年产量达20000余吨。
2
Aluminium and aluminium alloys. colddrawn rod bar and tube. part 8 : porthole tubes, tolerances on dimensions and form.
铝及铝合金。 冷拔棒材条材和管材。第8部分：多孔拉拔管尺寸和形状公差。
3
Experimental results proves that the theoretical values are close to those measured, so this formula can be used in production of cold-drawn inner fin tube.