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.
实验结果证明，理论计算值与实测值较吻合，因而，该公式可在冷拔内直筋管的生产中应用。
2
The formula of drawing force for cold-drawn inner fin tube is derived with slab method in this paper.